Your now a Competitor of the Pokemon Hunger games.
For those who don't know what a Hunger games is, It's based on the Movie/Book called The Hunger games. It's a game were competitors are put in some arena were you have to survive(It's a forest like arena . Your goal is to eliminate fellow players until you are the last remaining. If you win, you receive a price of course (I'll leave that to your imagination).
You have to Pick one Pokemon, and that will be your ONLY Pokemon throughout the whole game. There are no Pokeballs to catch wild Pokemon, so you have to avoid/fight Wild Pokemon. When you see an fellow competitor, you have to fight him/her, and no there is no running away from a trainer battle. When you lose a battle, you will be eliminated from the game.
It's not turn-based combat like the games, But more like Real time combat. So rules like priority doesn't count.
Legendaries are not allowed, but mega stones are. You can even introduce a Fan Made mega evolution if you want.
Keep in mind Battling skills are not the only skills you should have in this game. Survival skills are also Important (Like hunting for food, and making a shelter). Sometimes, Full heals and Max potions will appear.
Now my question to you Is: What Pokemon would you Pick, and Why?
Swampert, with the Swampertite. Swampert is a Pokemon who normaly lives in a Swamp, so It should have a good chance Of survival. It's really good In battling aswell, and It can do the heavy lifting to make a shelter.