All custom, except for the hopping-robot references (from Mega Man 1) and the pallete for the actual robots (from Super Princess Peach.)
Obviously, when you say 'all custom', you ACTUALLY meant to credit and add a link to squirrelsquid because you seem to have 'borrowed' a few of his colors and designs.
'scuse me? I haven't even heard of a squirrelsquid.
edit: Well, I was linked to Squirrelsquid's stuff, and man, I can understand why you'd think that. But I assure you that wasn't meant to happen.