Remove redundant lines from validation rules.
Remove bad and also unnecessary limiting of DB update.
Simplify messages.
Simplify comment.
Update reference to function.
Polish up delete_row function.
Remove unused functions.
Create custom model class from user_model.php
Rename class and update paths in comment.
Extend class and remove duplicate code.
Clean up get_rows function.
Separate functions by additional new lines.
Make Pokedex_model extend MY_Model and remove duplicate code.
Make Experience_model extend MY_Model and remove duplicate code.
Make message more general.
Make variable name more general.
Make message text and comment more general.
Add timestamp when inserting rows, if applicable.
Update the 'updated_at' field too if possible.
Updated timestamp field if present when updating a row.