There's a few things going on. First is getting the Toon support going, getting Toon World/Kingdom on the board. Giving your opponent a Kaiju to use other Toon cards on like Shadow Toon and Comic Hand. There's also plenty of cards to banish to boost Maju and Eater. The Extra Deck isn't used. I've only included Link monsters that the deck can go into. But the Extra Deck is used for Prosperity and Eater. If anything, Borg Blocker would be the only Extra Deck monster worth making.
Most of the deck is budget. I only use Prosperity because I own them. You can always use more Desires or Extravagance. There's no substitute for the second most expensive card, Bookmark.
This is just a fun deck to play. Obviously not close to being competitive.