>>31209883To be honest with there's not really a lot you can do with Meganium since it is heavily outclassed by almost every single Grass type in the game.
Generally you want to run at least one attacking move here, so Giga Drain for extra recovery or Dragon Tail for phasing. You can also run Sub for Leech/Sub trickery but you'll mostly likely never get anything done with it since Meganium is so slow.
If you want to go for ultra gimmick put this on YT for click bait shit you can run a Swords Dance sweeper set similar to some other grass mons, but good fucking luck.
Generally though defensive with a calm or careful nature with 252 in the respective stat and HP combined with aromatherapy on the set is usually as good as it's gonna get.
t. Someone who loves this Shitmon too much