I feel that the Treecko line is usable just running through the game, but outside of moving from gym to gym, they’re like a soccer player who has never heard of leg day.
Hey, don’t be hatin on treecko.
I’ve said it before, aesthetically the Treecko line is fine. Their movepool does not fit their stats though, and it hasn’t since Gen IV.
Who cares about stats?
Many people, especially when the stats determine how much damage you can take and deal out. Treecko’s line has terrible defenses so it cannot take a hit well. It has poor attack, so it cannot do damage efficiently with most of its movepool, but it has great speed and special attack. Unfortunately it has few options that take advantage of what it is made to do.
Competitively it’s terrible, but it still has a good design. Even just going through the game there are better grass types with access to better attacks and the means to use them well.