Other creatures have base power and toughness 2/2 and are Bears in addition to their other types.

Vigilance Other creatures you control get +2/+2. Creatures your opponents control get -2/-2.

Whenever another Bear you control enters, choose one — • Put two +1/+1 counters on target Bear. • Target Bear you control fights target creature you don't control.

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) Whenever one or more +1/+1 counters are put on this creature, you may create a 1/1 green Squirrel creature token.