Beautiful Katamari

To get this, you simply need to play online 50 times, you don't necessarily have to win. The easiest level I found for doing this is the level furthest to the left, called "House" or "Home" or something along those lines. It'll be the one where you're next to someone laying down on the ground with a cat on his leg, along with some fish tanks next to you. You just roll up everything in the middle. Takes about 2 minutes per game (including loading), times 50 is ~2 hours to get the achievement.

To earn this achievement, you need to play 50 games online (you do not have to win any)

Unfortunately, few people still play online so I would advise you to make or join a boosting session for this game. You can do so by looking to the right at the box that says "Achievement Gaming Sessions." If there are no sessions available, you can use this link to create one: https://www.trueachievements.com/creategamingsession.aspx?ga...

You're definitely gonna need a boost partner or to multibox this now. Complete 50 matches win or lose
Some tips:
Go to the yellow and blue rocket at the starting island and create a planet (host) or join one.
The HOST only has to spam and to fully AFK this.
The Guest only has to spam

If one of you is going for the cookies related achievements, they should roll and you should not. The player who rolls will be MUCH more likely to get the king's bonus.
If Both of you are going for cookies, BOTH players should do nothing. You'll split the pot and then the king will give out a bonus randomly.
-Each match is 5 mins long on the middle(default if spamming)option 4:10 mins total +loads, menus, maybe an additional minute per round, so roughly 5 HOURS total
-With minimum constant attention you can use the far LEFT option (House) which is only 2 mins with loads etc. so your mileage depends on attention paid.