well, I don't know if it will be compatible but anyways...
if @frame == nil
@frame = 0
end
@frame += 1
if @frame >= 20
@frame = 0
end
if @frame >= 10
@sprites["pokemon1"].src_rect.set(64,0,64,64)
else
@sprites["pokemon1"].src_rect.set(0,0,64,64)
end
pretty simple xD