You know how Superman turns to jelly when he's exposed to kryptonite? Well, the words "Please" and "Thank you" make mush out of Eyeris. Evil villains, take note! Just be very, very polite and this not-so-super hero will be putty in your claws!
Eyeris's other weaknesses:
Nubile young babes, preferably of the blow-up variety. (Real flesh and blood is too scary!) Offer him a freshly-blown babe and he is yours to bid as you please.
Robert Jordan - wave a book by this bloke under Eyeris's nose and he is compelled to read it, all the while screaming "It's so crap!". While he is thus distracted, grab your chance to conquer the world.
The Bee Gees' Stayin' Alive. The song plays and Eyeris's feet go out of control. They take on a life of their own and he ... struts! While strutting Eyeris is unable to give chase to villains.
N. B. This weakness doubles up as a one of Eyeris's dubious powers: The sight of the lad strutting has been known to accelarate pregnancies from the just-planted stage right to the time-to-pop stage in three minutes flat.
Eyeris, like Spidey, knows that with great power comes great responsibility and avoids maternity wards like the plague.
What a "hero"!