Adaptability increases STAB by 50% (from x1.5 to x2). Normal Gem increases a normal move by 50%. If you Tera into a type the pkmn already is, it increases stab by about 50%. Maybe more, maybe less. Porygon z has a 135 sp atk, and tri attack is 80 power. Porygon with adaptability, normal gem, and normal type tera is hitting its first tri attack at x3, and then x2.5 for as long as the tera lasts. Idk the stats for choice items, but i think choice specs would make it Worse.
Sylveon with pixilate is sorta similar. Pixilate turns normal moves into fairy and boosts power by 0.3, putting sylveon at a 1.8. Throat spray activates when a pkmn uses a sound based move and raises sp atk by 1 stage (0.5, so now at 2.3). Tera adds 0.5 (2.8), Sylveon has a 110 sp atk, and hyper voice is 90 power. Sylveon has basically a x3 boost for as long as its tera-ed, not including if it starts using calm mind to get it to x3.3 or higher
Basically Porygon has a 240 power move that can afflict status with a 135 sp atk, while Sylveon has a 250 power move that can hit multiple opponents with 110 sp atk. Ive also heard that dragon types are gonna get a huge buff through tera since they can turn into steel types to deal with all their weaknesses.
Forget Shedninja, same-type tera bonuses are what im terrified of. At least i can kill shedninja with leech seed, weather, or certain statuses (confusion, moves that do DoT and traps the pkmn). Sylveon and Porygon will simply leave a crater where i stand
Can't wait to use Sylveon or Porygon in SV to nuke my enemies out of existence
