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PokemonGameEditor
Discontinued An all in one tool started in 2010 by Gamer2020 for hacking the Game Boy Advanced Pokemon games.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
this would be super easy to do, even if you don't want to get into the newer more complicated stuff like decomp, there are plenty of older tools out there like Pokémon Game Editor and Gen III Rom Hacking Suite that would work just fine if all you're doing is changing names of Pokémon, moves, items, trainers, etc.
NOTE:
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Hence, a higher number means a more popular project.