GrizzlyBear

The GrizzlyBear is an enemy in EarthBound Beginnings. It is similar to the Bear and the Polar Bear. It has the ability to attack twice in 1 turn potentially doing around 200 damage vs. a normal party member's health. Like most other enemies on Mt. Itoi's plateau, it is highly recommended to only face this enemy with EVE in your party due to it's incredibly high attack.

Interestingly, this creature and its family are similar to the Ursa Major's (which is also called グリズリー in japanese) from its kin series, Dragon Quest, with Dragon Quest III having introduced the monster just a year before.

In-game description
"If you must sleep, don't borrow his bed!"