Aquanox

Aquanox is a Spark that appears in Mario + Rabbids Sparks of Hope. It is a turquoise Spark made of water, and possesses water-based abilities. Its name is a portmanteau of "aqua" and "". Its Power is Splash Attack, which makes all of a Hero's weapon-based attacks deal water-based damage and allows them to inflict the Splash Super Effect on enemies, causing them to bounce away. Its Bonus is Splash Protector, which reduces the damage Heroes take from Super Effects and prevents them from being afflicted with the Splash Super Effect. The Splash Super Effect is similar to the Bounce effect from Mario + Rabbids Kingdom Battle.

Mario + Rabbids Sparks of Hope website
''By his side here you find Aquanox, who is always up to make a big splash! Get ready to get swept away by its waves. Thanks to this little creature your hero's attacks turn to water and will make those who seek to encroach simply bounce away.''