Cake Bash

Alright, since I thought the other guide wasn't really a guide or that helpful I thought about making my own. The achievement isn't that hard at all and took me only 3 tries. Had to start over twice because I got hit by on of the bots while holding down and performing a normal punch afterwards.

Here's how to get it/I got it:

1. Go to 'Recipes'.
2. Select your cake and leave the 3 bots in, since it's got to be a 4 player Bash.
3. I recommend doing this in 'Cookie Bash', since you can use mega bashes to also break the cookies.
4. For the location I choice the 'Beach', since I personally find that the easiest location (but any location will work).
5. Now for the actual match only use MEGA BASHES

Some additional tips:

• If you are holding down and get hit by a mega bash from one of the bots or any other thing (like the Beach Ball/Crab) let go of immediately, if you don't you will perform a regular punch and have to start over.
• I think that Fruity Pie might also be a very good game type since you can just do one Mega Bash and afterwards you don't have to bash/punch any of the opponents. Just score points by throwing in the fruit, but that's not how I got it so I'm not sure if it's the easier or not.
• If you have 4 controllers you can also use them instead of bots and this makes it super easy, since they will just be idling during the match.

Very easy : not need 3 human player. Play with bots and use megabash in one round bash.