Origins: Dragon Ball
Classification: Saiya-jin(Saiyan), Fusion/Fused being
Threat level: Quasar
Physical strength: At least star level (was overwhelming Buu's durability and exhausting his stamina with mere casual physical blows)
Destructive capacity: Likely multi solar system, possibly even higher (Ridiculously higher than beings whom already dwarf likely solar system level beings, Vegito>>>>>Super Buu w/Gohan+Gotenks+Piccolo absorbed>>Mystic Gohan>>base Super Buu>>>Fat/Majin Buu>>Majin Vegeta>>Super Perfect Cell)
Durability: Likely multi solar system, possibly even higher (Was by far strongest character in Dragon Ball universe till the introduction of Beerus, capable of tanking any attack thrown by him by any character ranked under himself)
Speed: At least sub-relativistic+ travel, at least faster than light+ combat (at least several times faster than Super Buu w/Gohan and co. absorbed)
Intelligence: High. Is a fusion which holds the best attributes of both Goku and Vegeta, two of the greatest battle genius in the universe. Showed capable of foreshight and planning ahead in his fight with Super Buu where he planned out and succesfully tricked his opponent to fulfill his goal.
Stamina: High. Just as Goku and Vegeta he can in base can go training for days straight, can also maintain Super Saiya-jin for days if he isn't required to waste considerable amounts of energy, similar scenario in Super Saiya-jin 2, although the energy consumption is about twice as fast. Super Saiya-jin 3 lasts at least several minutes in-combat but drains energy far faster than the previous two (toll of SSJ3 is even heavier in his GT Kid form). Should be even higher than this as Vegito.
Standard equipment: Potara earrings.