>>58779587here's a quick and easy way to fix meganium, no brand new moves/abilities/etc or BST increases required
+40 attack to take advantage of its pretty good physical movepool and setup options, and give it an attack stat more suited for a big stompy dinosaur
-40 speed because its speed was already mediocre in the first place so it'd be better off with low speed so it can be useful in trick room
hidden ability can be whatever, almost anything's an improvement over what it currently has
optionally, give it a dragon secondary typing because being a dinosaur is enough to warrant dragon typing, and because it'd be cool
optionally give it +5 to whatever stat if you feel like bringing it up to the 530 BST par for starters