Wow this is really cool. I can also see why you can't get rainbows with it though. It is pretty OP. While not perfect, I was able to absolutely destroy a level that originally gave me issues. Like in single player hardcore I had to use mines to rainbow it because I guess my strat just wasn't good enough. With the AI was in excess of coins and gems the whole time and no monster came close.

Amazing, any other secrets?

Is not working in PC

lets go

I never knew this and I have 100+ hours in this game. Crazy. I even played it on PS3 before Ultimate.

Cheers, faved and rated

I can see why they hid this feature. It doesn't collect everything, it can never go around obstacles, it can't always stay still (while upgrading) when there is nothing to do, it sometimes stands off-towers, not upgrading, like an idiot. BUT I do like how it does collect and upgrade a lot, making this a great alternative to playing both controllers alone to ease the game. Is there any other hidden features? I wish I could modify the AI priorities/behavior, that would totally RULE!

Holy shit dude

I've updated the guide to mention that you need to hold R1+Select until after A has been pressed, thanks guys.

To Morty, you need to continue holding the keys while you press Enter/A. So basically, starting a stage in single player, you basically hit RB+Back+A to enter the stage, giving you an AI assistant. Likewise, F2+F4+Enter if your on the keybord.