Here is the full list of all 10 Super Bomberman R Online achievements worth 1,000 gamerscore.
Win a battle with all 8 Brothers
Raise the number of holdable bombs to the max
Raise movement speed to the max
Raise firepower to the max
Died by destroying a Block
Win a game while riding Louie
Come 1st in a Battle 64
Dominate an area in a Battle 64
Win a game without picking up a single item panel
Died by your own bomb