Besides the obvious Mario/Sonic games what are the best side scrollers?

[playplayaj]

Forgot to mention battletoads vs double dragon

 

[Days of Future Piff]

No mention of Super Castlevania 4?

A lot of these other games already mentioned are
Mega Man X, Super Metroid, Donkey Kong Country 2, Contra 3, Actraiser, Gunstar Heroes, Rocket Knight Adventures, Vectorman, Metal Slug, etc.

If we're talking more recent games, Rayman Origins, Limbo, and Super Meat Boy

 

[Trill Bellamy]

Streets of Rage 2

 

[FreshABM]

Gun Star Heroes

 

[spliz]

Forgot to mention battletoads vs double dragon

Alotta people do..and that game was classic to me...

 

[Batz]

Forgot to mention battletoads vs double dragon

They did a crossover?

 

[DougFunnY]

Donkey Kong Country 1 and 2>>>>

 

[blockburna420]

 

[playplayaj]

They did a crossover?

my nikka....it was glorious
the running jump kicks..........riding them hover cycles to fight a giant rat named Big Blag...Turning into tornadoes and wrecking balls all while on a rope

 

[Batz]

Childhood favorite

 

[NZA]

castlevania: rondo of blood (best castlevania intro ever)
umihara kawase (wanted to import it for DS, but was too cheap and then the next time i looked up, they were going up in price even more)
bionic commando (only the original nes version)