I thinkthe last boss you fight with is darkrai but im not very sure.
The last boss in Pokémon Mystery Dungeon: Explorer of Time is Dialga. After that boss you get the credits list and it says "The End". But it's possible to keep playing after that.
Darkrai
dark dialga is the last boss in the normal storyline, but in the post game however darkrai is the last boss.
If u really want to know ill tell u wat i know i think the last boss is darkrai which is in deep dark crater
Sky Tower Summit: Rayquaza Lvl 35,Dragon Flying,600HP: Moves Twister,Dragon claw, Dragon Dance, Anctient power. Edit: tru but that is the story boss... the last boss i belive is mew. if you battle him, GOOD LUCK!
its marine resort
it is not raqaza all the guy that ive killed right now are zapdos moltres articono rayqaza groundon kygore
Hes the last boss, in dark crater Hint: bring ALOT of reviver seeds since Cressilia will be fighting with you and darkrai has max evasion and nightmre.
it should be giritina
Buy friend areas. The last dungeon is the deoxys one
Fight Darkrai
It is called "In the Future of Darkness."