>>57729378Even in the game they point out terapagos isn't really powerful. Like when you beat it kieran/briar are all "huh, that's it? Are we sure this is a legendary pokemon" right before everything goes to shit via tera orb.
Stellar form in the game nearly killed everyone and anime wise it nearly killed terapagos... there's plenty of reasons to not use that form but still have it battle. Hell, I'd point out it didn't do shit against rayquaza when they fought it in area zero.