Entei is a type of Pokemon that appears out of a Poke Ball in Super Smash Bros. Brawl. It is treated as a legendary Pokemon, making its appearance not very common. When Entei appears out of a Poke Ball, it will roar and stand on its hind legs. It then lets out its attack, known as Fire Spin. When Entei lets this attack out, a large column of fire surrounds its body. Players who are caught in the column of fire (excluding the summoner) will be trapped inside of the column of fire and sent to the top of it. Players trapped inside Entei's column of fire also take a pretty decent amount of Damage, usually more than 70%. Entei also has its own Trophy in Super Smash Bros. Brawl. Because Entei now roars and stands on its hind leg before it utilizes its attack, Entei's appearance is more intense than it was in Super Smash Bros. Melee.
Entei's Trophy in SSBB
A Volcano Pokemon. When Entei barks, a volcano erupts, and its said that a new Entei is born every time a volcano appears. A proverb claims that the warmth of summer is created by Entei racing through the clouds. Entei uses Fire Spin, a flaming vortex that traps and damages foes for multiple turns.
Entei stands on its hind legs next to Lucario before it executes (lets out) its attack. This is on Pokemon Stadium 2.
Entei surrounds itself with the column of fire (Fire Spin) next to Lucario on Pokemon Stadium 2.
Another view of Entei's Fire Spin. The stage shown here is Pokemon Stadium 2.