I personally classify the SRB2 Amy as 'Rosie' because she doesn't have her hair down like in SA... but more like Sonic's as in when she was young.
However I second the Cream and Tikal wad thoughts... I've tried to make a Tikal wad myself using Nitro's sprite as a template, and for fixing the front pose, I've got everything but the arms looking good problem being that they end up looking like spaghetti or logs...
I did get a single pose for the character select pic of her lounging around petting a chao but that hardly counts. <_<
And for the A2A8, A4A6 frames, shouldn't one leg be slightly further up than the other seeing as he does have them somewhat apart. BTW, I can't wait to see what those weird spikes look like on the side frames.