FPS Drops on some parts of the game

[jisifus]

So i just started playing smash bros. melee on this nice emulator, but every time i finish a battle or there's a lot of action going on the FPS go to 30 which makes it unplayable for a few seconds.
It can't be my PC D

So here are the settings:
http://gyazo.com/42b394c7d18b9144352149f000c2b850
http://gyazo.com/624d974e4b8ac22107a08ef0e8a938e9
http://gyazo.com/e47aa000ce9dfe6a38a2c40a6f72aa7d
http://gyazo.com/d523090e7c742fabded26a943a3f358a
http://gyazo.com/f0305bd759912d08db73bb54e85f4f3e
http://gyazo.com/78d409a81bd47314a02f2dffcd2a3126
(I fucking love Gyazo, its amazing )

Please help!