Moderately challenging boss fights.

[Cap'n Crunch]

Wart from SMB 2 was moderately challenging.

[ProfessorCool]

Captain Big Lips from ronald mcdonald's treasure island

[HickMan]

The thing in the thing

[EverythingWillSuck]

Originally Posted by ProfessorCool

Captain Big Lips from ronald mcdonald's treasure island

and the alien : (

it's the only game i know where you have to scarifice yourself to win

[Perndog]

The Samus clone in Metroid Fusion was moderately tough. Fucking ice beam...most irritating weapon through the whole series and they make that the thing you're vulnerable to instead of something cool and ever-popular like the wave beam.

[ScruU2wice]

Virtually all the bosses in MGS took me some time.

all those goddamn metal gear rays, from the second one

[Nerd]

Ridley from the Metroid games. He's supposed to be really hard but he's usually not, and can be beaten even with crappy health. He's always fun to fight tho.

[ItalianStereotype]

meta-ridley from Prime was fucking hard, yo.

[eggyolk]

That rock man from Metroid was hard. :/

[executioneer]

it's the only game i know where you have to scarifice yourself to win

black cauldron

although you don't have to if you befriend Gurgi :/

-willie

[Nerd]

Originally Posted by ChainsawSmash

meta-ridley from Prime was fucking hard, yo.

I never played it.

[pjalne]

Originally Posted by eggyolk

That rock man from Metroid was hard. :/

Just about every boss in that game was hard. The end boss wasn't, but Ridley, the rock guy and the super pirate were.

[Matt Harty]

Meta Ridley was so annoying because if you go hit, you'd get pummeled right after. That is unless you got away damn fast and turned around to see it charging again.

[Supafly345]

Wrigley's is moderately hard at first, but then get really easy after you break it down a bit.