Steve Eggman, originally known as Morpho is a character that appears in the Sonic Boom television series. In the original narrative, he is a shapeshifting robot from another dimension built by his native Dr. Eggman, but would migrate to the Sonic Boom World to join this reality's version of Eggman. However, in the Rewrite, he actually is Eggman’s younger brother, who has the ability to shapeshift due to a side effect he inherited from dimension hopping.

Morpho is evil, yet intelligent, manipulative and shrewd, with a bit of an ego. Highly devious, he knows how to take advantage of people and their personality traits, and takes delight in tearing friendships apart by preying on peoples' vulnerabilities and disagreements. He also tends to speak in a slang-based manner, often referring to others using the word (or words including it) "bro". Like Dr. Eggman though, Morpho has a less malevolent side as well. He is pretty immature (especially in the company of Eggman) and is shown to enjoy some of them smaller things in life, like going sightseeing and the company of his Sonic Boom World family.

Normally, Morpho stays completely incognito while misleading people with his shapeshifting. Ironically though, he is not a very good actor and has trouble emulating those he impersonate. When he can make his disguise work however, he becomes very dedicated to preserving his cover. As such, he will on the rare occasion drop his disguise and take direct action to stop others from ruining his plans. For all his deception though, he does have a small sense of courtesy; when he has misled someone he supports, he will come clean and apologize for what he did. He also offered Amy a turnip after trapping her. Also, when others are aware of his true identity, he wants them to refer to him by his real name instead of one of his aliases.

Morpho has an extremely arrogant attitude which makes him think his plans are infallible. This also makes him prone to underestimating his opponents, like when he underestimated Team Sonic's unity, which led to the downfall of one of his plans.

In the show, he is voiced by Roger Craig Smith, example of his voice can be found here: https://youtu.be/05o5PzSS1Sw?t=98