Because Oro represents the heart of MUGEN: . You can have the lore-accurate, one-armed tactician who struggles against Chun-Li. Or you can have the multi-armed god who destroys Galactus in one hit. Both are valid. Both are Oro.
In official games, Oro is balanced. In MUGEN, that balance is optional. The "Oro Mugen" experience typically falls into three categories: oro mugen
One of the most famous MUGEN rivalry videos features (Kong’s version) vs. Dragon Claw (Reu’s OC). The match went viral in 2019 for its back-and-forth parry war. It proved that balanced MUGEN can be as tense as Evo. Because Oro represents the heart of MUGEN:
Oro’s hunched posture, wild gray hair, and glowing red eyes look incredible in MUGEN’s pixel-art style. Many custom sprites and HD remakes preserve the gritty, 90s Capcom feel while adding modern effects. Both are valid