diff --git a/pokedex/compatibility.py b/pokedex/compatibility.py
index 4eea75b..49c151d 100644
--- a/pokedex/compatibility.py
+++ b/pokedex/compatibility.py
@@ -3,6 +3,7 @@
 Currently these are functions missing from Python 2.5.
 """
 from __future__ import print_function
+import six
 
 try:
     from itertools import permutations
@@ -67,7 +68,7 @@ except ImportError:
 
         # Parse and validate the field names.  Validation serves two purposes,
         # generating informative error messages and preventing template injection attacks.
-        if isinstance(field_names, basestring):
+        if isinstance(field_names, six.string_types):
             field_names = field_names.replace(',', ' ').split() # names separated by whitespace and/or commas
         field_names = tuple(map(str, field_names))
         if rename:
diff --git a/pokedex/db/__init__.py b/pokedex/db/__init__.py
index 3e8ecb1..07de822 100644
--- a/pokedex/db/__init__.py
+++ b/pokedex/db/__init__.py
@@ -4,7 +4,7 @@ import re
 from sqlalchemy import engine_from_config, orm
 
 from ..defaults import get_default_db_uri
-from .tables import Language, metadata
+from .tables import metadata
 from .multilang import MultilangSession, MultilangScopedSession
 
 ENGLISH_ID = 9
@@ -46,7 +46,7 @@ def connect(uri=None, session_args={}, engine_args={}, engine_prefix=''):
     ### Connect
     engine_args[engine_prefix + 'url'] = uri
     engine = engine_from_config(engine_args, prefix=engine_prefix)
-    conn = engine.connect()
+    engine.connect()
     metadata.bind = engine
 
     all_session_args = dict(autoflush=True, autocommit=False, bind=engine)
diff --git a/pokedex/db/load.py b/pokedex/db/load.py
index 7a195a0..2ecc109 100644
--- a/pokedex/db/load.py
+++ b/pokedex/db/load.py
@@ -3,7 +3,6 @@ from __future__ import print_function
 
 import csv
 import fnmatch
-import io
 import os.path
 import sys
 
@@ -12,7 +11,7 @@ import sqlalchemy.sql.util
 import sqlalchemy.types
 
 import pokedex
-from pokedex.db import metadata, tables, translations
+from pokedex.db import metadata, translations
 from pokedex.defaults import get_default_csv_dir
 from pokedex.db.dependencies import find_dependent_tables
 from pokedex.db.oracle import rewrite_long_table_names
@@ -323,7 +322,7 @@ def load(session, tables=[], directory=None, drop_tables=False, verbose=False, s
                 # Could happen if row A refers to B which refers to C.
                 # This is ridiculous and doesn't happen in my data so far
                 raise ValueError("Too many levels of self-reference!  "
-                                 "Row was: " + str(row))
+                                 "Row was: " + str(row_data))
 
             session.execute(
                 insert_stmt.values(**row_data)
diff --git a/pokedex/db/markdown.py b/pokedex/db/markdown.py
index 8bbc0d0..115faa4 100644
--- a/pokedex/db/markdown.py
+++ b/pokedex/db/markdown.py
@@ -174,7 +174,7 @@ class PokedexLinkPattern(markdown.inlinepatterns.Pattern):
         self.game_language = game_language
 
     def handleMatch(self, m):
-        from pokedex.db import tables, util
+        from pokedex.db import tables
         start, label, category, target, end = m.groups()
         try:
             table = dict(
diff --git a/pokedex/db/multilang.py b/pokedex/db/multilang.py
index 06a5ab8..00cdb33 100644
--- a/pokedex/db/multilang.py
+++ b/pokedex/db/multilang.py
@@ -1,7 +1,5 @@
-from functools import partial
-
 from sqlalchemy.ext.associationproxy import association_proxy, AssociationProxy
-from sqlalchemy.orm import Query, aliased, mapper, relationship, synonym
+from sqlalchemy.orm import Query, mapper, relationship, synonym
 from sqlalchemy.orm.collections import attribute_mapped_collection
 from sqlalchemy.orm.scoping import ScopedSession
 from sqlalchemy.orm.session import Session, object_session
diff --git a/pokedex/db/tables.py b/pokedex/db/tables.py
index 322d756..b5e20ba 100644
--- a/pokedex/db/tables.py
+++ b/pokedex/db/tables.py
@@ -26,18 +26,15 @@ classes in that module can be used to change the default language.
 """
 # XXX: Check if "gametext" is set correctly everywhere
 
-import collections
 from functools import partial
+import six
 
-from sqlalchemy import Column, ForeignKey, MetaData, PrimaryKeyConstraint, Table, UniqueConstraint
+from sqlalchemy import Column, ForeignKey, MetaData, PrimaryKeyConstraint, UniqueConstraint
 from sqlalchemy.ext.declarative import declarative_base, DeclarativeMeta
 from sqlalchemy.ext.associationproxy import association_proxy
 from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm import backref, relationship
-from sqlalchemy.orm.session import Session
-from sqlalchemy.orm.interfaces import AttributeExtension
-from sqlalchemy.sql import and_, or_
-from sqlalchemy.schema import ColumnDefault
+from sqlalchemy.sql import and_
 from sqlalchemy.types import Boolean, Enum, Integer, SmallInteger, Unicode, UnicodeText
 
 from pokedex.db import markdown, multilang
@@ -56,7 +53,7 @@ class TableSuperclass(object):
         if not pk_constraint:
             return u"<%s object at %x>" % (typename, id(self))
 
-        pk = u', '.join(unicode(getattr(self, column.name))
+        pk = u', '.join(six.text_type(getattr(self, column.name))
             for column in pk_constraint.columns)
         try:
             return u"<%s object (%s): %s>" % (typename, pk, self.identifier)
@@ -64,10 +61,13 @@ class TableSuperclass(object):
             return u"<%s object (%s)>" % (typename, pk)
 
     def __str__(self):
-        return unicode(self).encode('utf8')
+        if six.PY2:
+            return six.text_type(self).encode('utf8')
+        else:
+            return type(self).__unicode__(self)
 
     def __repr__(self):
-        return unicode(self).encode('utf8')
+        return str(self)
 
 mapped_classes = []
 class TableMetaclass(DeclarativeMeta):
diff --git a/pokedex/db/translations.py b/pokedex/db/translations.py
index 05a04fa..606a66d 100755
--- a/pokedex/db/translations.py
+++ b/pokedex/db/translations.py
@@ -30,6 +30,7 @@ import os
 import re
 from collections import defaultdict
 
+import six
 from six.moves import zip
 
 from pokedex.db import tables
@@ -155,10 +156,13 @@ class Message(object):
         return template.format(self=self, string=string)
 
     def __str__(self):
-        return unicode(self).encode('utf-8')
+        if six.PY2:
+            return six.text_type(self).encode('utf8')
+        else:
+            return type(self).__unicode__(self)
 
     def __repr__(self):
-        return unicode(self).encode('utf-8')
+        return str(self)
 
 class Translations(object):
     """Data and opertaions specific to a location on disk (and a source language)
@@ -648,7 +652,6 @@ def match_to_source(source, *translations):
         if first or match:
             best_string = current_string
             best_crc = current_crc
-            best_message = translation
         if match:
             break
         first = False
diff --git a/pokedex/db/util.py b/pokedex/db/util.py
index 6c26d67..8f461c1 100644
--- a/pokedex/db/util.py
+++ b/pokedex/db/util.py
@@ -9,8 +9,6 @@ from sqlalchemy.sql.expression import func
 from sqlalchemy.sql.functions import coalesce
 from sqlalchemy.orm.exc import NoResultFound
 
-from pokedex.db import tables
-
 ### Getter
 
 def get(session, table, identifier=None, name=None, id=None, language=None):
diff --git a/pokedex/doc/tabledoc.py b/pokedex/doc/tabledoc.py
index 04bdfda..0acef52 100644
--- a/pokedex/doc/tabledoc.py
+++ b/pokedex/doc/tabledoc.py
@@ -9,19 +9,17 @@ but documents Pokédex mapped classes.
 
 import functools
 import textwrap
+import six
 
 from docutils import nodes
 from docutils.statemachine import ViewList
-from sphinx.util.compat import Directive, make_admonition
-from sphinx.locale import _
 from sphinx.domains.python import PyClasslike
-from sphinx.util.docfields import Field, GroupedField, TypedField
-from sphinx.ext.autodoc import ClassLevelDocumenter
+from sphinx.util.docfields import TypedField
 
 from sqlalchemy import types
 from sqlalchemy.orm.attributes import InstrumentedAttribute
 from sqlalchemy.orm.properties import RelationshipProperty
-from sqlalchemy.orm import Mapper, configure_mappers
+from sqlalchemy.orm import configure_mappers
 from sqlalchemy.ext.associationproxy import AssociationProxy
 from pokedex.db.markdown import MoveEffectPropertyMap, MoveEffectProperty
 
@@ -128,7 +126,7 @@ def with_header(header=None):
 ### Section generation functions
 
 def generate_table_header(cls, remaining_attrs):
-    first_line, sep, next_lines = unicode(cls.__doc__).partition(u'\n')
+    first_line, sep, next_lines = six.text_type(cls.__doc__).partition(u'\n')
     yield first_line
     for line in textwrap.dedent(next_lines).split('\n'):
         yield line
@@ -184,7 +182,7 @@ def generate_columns(cls, remaining_attrs):
             yield column_header(c, name) + ':'
         yield u''
         if c.doc:
-            yield u'  ' + unicode(c.doc)
+            yield u'  ' + six.text_type(c.doc)
             yield u''
 
 @with_header(u'Internationalized strings')
@@ -200,7 +198,7 @@ def generate_strings(cls, remaining_attrs):
                         translation_class.__table__.name)
                 yield u''
                 if c.doc:
-                    yield u'  ' + unicode(c.doc)
+                    yield u'  ' + six.text_type(c.doc)
                     yield u''
 
 @with_header(u'Relationships')
@@ -220,7 +218,7 @@ def generate_relationships(cls, remaining_attrs):
         yield u'(→ %s)' % class_name
         if rel.doc:
             yield u''
-            yield u'  ' + unicode(rel.doc)
+            yield u'  ' + six.text_type(rel.doc)
         if rel.secondary is not None:
             yield u''
             yield '  Association table: ``%s``' % rel.secondary
@@ -299,7 +297,6 @@ class DexTable(PyClasslike):
                 break
         else:
             raise ValueError('Table %s not found' % name)
-        table = cls.__table__
 
         remaining_attrs = set(x for x in dir(cls) if not x.startswith('_'))
         remaining_attrs.difference_update(['metadata', 'translation_classes',
diff --git a/pokedex/formulae.py b/pokedex/formulae.py
index 62271f1..d942d74 100644
--- a/pokedex/formulae.py
+++ b/pokedex/formulae.py
@@ -2,7 +2,7 @@
 """Faithful translations of calculations the games make."""
 from __future__ import division
 
-from itertools import izip
+from six.moves import reduce, xrange, zip
 
 def nCr(n, r):
     """n-choose-r.
@@ -13,7 +13,7 @@ def nCr(n, r):
 
     return reduce(
         lambda x, y: x * y[0] / y[1],
-        izip(xrange(n - r + 1, n + 1),
+        zip(xrange(n - r + 1, n + 1),
              xrange(1, r + 1)),
         1)
 
diff --git a/pokedex/struct/_pokemon_struct.py b/pokedex/struct/_pokemon_struct.py
index ba67eff..80a987b 100644
--- a/pokedex/struct/_pokemon_struct.py
+++ b/pokedex/struct/_pokemon_struct.py
@@ -6,7 +6,9 @@ format sent back and forth over the GTS.
 
 import datetime
 
-from construct import *
+from construct import (Adapter, BitField, BitStruct, Buffered,
+                       EmbeddedBitStruct, Enum, Flag, Padding, String, Struct,
+                       ULInt16, ULInt32, ULInt8)
 
 # TODO:
 # - strings should be validated, going both in and out
diff --git a/pokedex/tests/test_database_sanity.py b/pokedex/tests/test_database_sanity.py
index 276491b..f5747ca 100644
--- a/pokedex/tests/test_database_sanity.py
+++ b/pokedex/tests/test_database_sanity.py
@@ -5,7 +5,7 @@ from sqlalchemy.orm import aliased, joinedload, lazyload
 from sqlalchemy.orm.exc import NoResultFound
 from sqlalchemy.sql import func
 
-from pokedex.db import connect, tables, util
+from pokedex.db import tables, util
 
 def test_encounter_slots(session):
     """Encounters have a version, which has a version group; encounters also
diff --git a/pokedex/tests/test_schema.py b/pokedex/tests/test_schema.py
index 736e960..0a17dc4 100644
--- a/pokedex/tests/test_schema.py
+++ b/pokedex/tests/test_schema.py
@@ -3,11 +3,10 @@
 import pytest
 
 from sqlalchemy import Column, Integer, String, create_engine
-from sqlalchemy.orm import class_mapper, joinedload, sessionmaker
-from sqlalchemy.orm.session import Session
+from sqlalchemy.orm import joinedload, sessionmaker
 from sqlalchemy.ext.declarative import declarative_base
 
-from pokedex.db import tables, markdown
+from pokedex.db import tables
 from pokedex.db.multilang import MultilangScopedSession, MultilangSession, \
     create_translation_table
 
diff --git a/pokedex/tests/test_strings.py b/pokedex/tests/test_strings.py
index 0517460..1c7978f 100644
--- a/pokedex/tests/test_strings.py
+++ b/pokedex/tests/test_strings.py
@@ -3,8 +3,6 @@
 import pytest
 parametrize = pytest.mark.parametrize
 
-from sqlalchemy.orm.exc import NoResultFound
-
 from pokedex.db import tables, connect, util, markdown
 
 @pytest.fixture(scope="module")
diff --git a/pokedex/tests/test_util.py b/pokedex/tests/test_util.py
index 4f2a6d1..96000e5 100644
--- a/pokedex/tests/test_util.py
+++ b/pokedex/tests/test_util.py
@@ -3,7 +3,7 @@
 import pytest
 parametrize = pytest.mark.parametrize
 
-from pokedex.db import connect, tables, util
+from pokedex.db import tables, util
 
 def test_get_item_identifier(session):
     item = util.get(session, tables.Item, identifier='master-ball')
diff --git a/pokedex/util/media.py b/pokedex/util/media.py
index 0b4f60d..cb1abaa 100644
--- a/pokedex/util/media.py
+++ b/pokedex/util/media.py
@@ -32,6 +32,7 @@ All images are in the PNG format, except animations (GIF). All sounds are OGGs.
 
 import os
 from functools import partial
+import six
 
 class MediaFile(object):
     """Represents a file: picture, sound, etc.
@@ -83,7 +84,7 @@ class MediaFile(object):
 
 class BaseMedia(object):
     def __init__(self, root):
-        if isinstance(root, basestring):
+        if isinstance(root, six.string_types):
             self.file_class = partial(MediaFile, root)
         else:
             self.file_class = root
@@ -179,7 +180,7 @@ class _BasePokemonMedia(BaseMedia):
 
         If the sprite is not found, raise a ValueError.
         """
-        if isinstance(version, basestring):
+        if isinstance(version, six.string_types):
             version_dir = version
             try:
                 generation, info = self._pokemon_sprite_info[version_dir]