* The game doesn't exist: This is the most likely scenario. There are countless fan-made games and mods out there, but without more information, it's hard to tell if this one is real.
* The name is slightly different: Maybe there's a similar game with a slightly different title.
* You're thinking of a different game: Sometimes we remember things incorrectly. Is it possible you're thinking of a different Pokemon game or a different tower defense game?
To help me understand better:
* Can you provide any other details about the game? (like what platforms it was on, who made it, any characters or specific features)
* Did you see it on a specific website or streaming platform?
With more information, I might be able to help you find it.