Go Mecha Ball

The blue coins you pick up during your runs are glitch coins, this is what we use to buy the upgrade gachas you may have noticed in the beginning hub area. You can buy any one of the 3 for 15 glitch coins to unlock this achievement.

Worth noting you only have to walk close to the button to trigger the buy. So if you want to buy a weapon gacha first, stay away from the upgrades and ability buttons.