Critter Crunch

In the tutorials, they'll show you what to do in order to bring Smalls out to feed him. Make sure that you fill him completely (until he burps), to get a completion. You'll also have to beat the level to get the gray icon of Smalls to be in color. As you go further on in the levels, they will be a little tough to complete and feed Smalls at the same time. Be quick with your movements and try to feed him right when he appears, you can do that throughout the level (as long as you keep bringing him out to be fed).