Even builds from prototype versions of games like Pokemon X/Y and HeartGold/SoulSilver have been found in the leak.
However, the project has either been delayed or cancelled at this point.
A 24th Pokemon movie codenamed Bauer was also in the works, but has seemingly been delayed or cancelled.
As for the games, Pokemon Legends: Z-A has reportedly had its source leaked.
Interestingly, the Switch 2 is also codenamed Ounce.
Another multiplayer Splatoon-like Pokemon game was also mentioned in the leak.
Hence, one should take this information with a grain of salt.