Stealth that's fantastic. How did you do the grass? I love my grass/hair nozzle, but think it tends to give cartoon-style grass, rather than anything realistic.
Think I've decided to bite the bullet and try and give my boys the cakes they've asked for. Could be a complete disaster, but it's worth a shot.
I've bought a Blastoise collectable figure to use as a guide and also found a step by step guide to drawing him, so that will help with basic shapes. Haven't formulated the whole plan yet, but think it will probably involve some rice crispie cake moulding for the legs and guns.
As for the ender dragon, there are lots of pictures around from all angles if you Google, but I think I need to find one of it lying down, as I don't want to be getting into cakes standing on four legs and having to use boards for reinforcement. Been watching lots of guides for covering square cakes in fondant and whilst I won't be able to get a sharp line, I think it will be good enough to do the job.
Of course I may still chicken out if I can't come up with a good enough plan for them.