On the main menu, click on Game Mode, and on Other tab, select Local.

When you're inside it, click on Edit Rules on the upper right on the screen.

Set the configs to:
Game mode: STOMP;
Ringouts: Infinite;
Time: 7 minutesis all you can spare with them xD

And on Map Selection, choose The Court 2

After that, return to fighter selection.

On fighter selection, choose your character (I recommend Harley Quinn, since her main attack on this mode is a gun, which counts for the projectile ringout achievements).

After that, click on Add Bot button, and add 3 bots to the match. Don't forget to change their team flags to red (Team 2), and change their difficulty to very easy.

Once all configs are set, click on Ready and start the match.

In Stomp, you cannot walk or run, only jump. You can get ringouts with just 1 hit, which is perfect for spike ringouts, as you need to be above the enemy.

You can easily get double ringouts too by hitting 2 enemies at the same time, or within couple seconds.

Since the ringout max number is set to infinite, you can try everything to farm all types of it, and within 7 minutes, you can around 100 ringouts or so, which helps a lot on the % completion. And you can get all of them in around 2/3 hours of farming, it depends from people to people. And after the match ends, you can always start again and keep farming 'till you get the achievements.

I hope this guide was useful on your journey to the 100% completion. As always, if this guide helped you, consider leave it a like and comment your thoughts down below. Multiversus might got terminated, but will never be forgotten. Thanks for reading!