A Serperior that protected the forest it lived in and all its inhabitants a long time ago. It valiantly fought against five rampaging Pokémon who were destroying and hurting everything despite being disadvantaged, causing it to adapt and change its appearance.
It's ability is Emerald Jewel: "Greatly weakens super effective moves and nullifies the additional effects of moves who's type is super effective on this Pokémon"
Which means that for example, Flamethrower not only is it weaker despite being a super effective move, it also will never burn this Serperior. Or another example is Pounce, a Bug type move that deals damage and lowers speed, with Emerald Jewel it's now weaker and incapable of lowering speed. Basically secondary effects are nullified.
It's signature move is Beryl Blast, a special Grass type move that ignores abilities that block it and does neutral damage to Pokémon that normally resist it.
It's a special attacker with pretty good defenses, but lackluster speed and physical attack
(Hey, sorry for reposting this again, I decided to delete the old post because I didn't like the backstory I gave it and I didn't give many explanations on what it does. So here it is, now there's a better backstory, an ability, a signature move and even the possible stats)
by Voidstone0