This is a tool that I built to solve a problem I was facing: my deep-seated need to have 100% completion of every single Pokémon game's pokédex.
It accepts the name of a Pokémon, then searches through the entire database of pokédex entries to see if there are any other entries that can be completed at the same time.
Uses a combination of serializing/deserializing data objects, intelligent string matching, and depth-first searching to parse almost 10000 entries nearly instantaneously.