Hugo is well-educated and is often found reading a book or doing research. He has vast knowledge of the history of Skylands and is a great source of information. He isn't a fighter and can be a little cowardly due to being fairly weak and uncoordinated. Hugo also has a strong dislike for sheep and tries to convince others to distrust them on many occasions.
Skylanders: The Machine of Doom
Hugo went to the Mabu Market after seeing that Eon's citadel larders were running low. While he was browsing the stalls, both Hugo and Flynn were attacked by flying sheep and escaped to warn the Skylanders. On Eon's Island, the Skylanders didn't believe Hugo and Flynn at first, but upon seeing the Mabu Market in a wreck and the flying sheep through use of Eon's portal, the great Portal Master sent Spyro, Gill Grunt, and Eruptorto find out what was going on.
Afterwards, Spyro told Hugo of an item Kaos was seeking called the Chattering Key, which the Mabu immediately went to searching for through the library. Hugo was able to find out through ancient records that the Key was an item created by the Arkeyans that would unlock an ancient Arkeyan artifact. The Mabu then handed the Skylanders a map to the Forest of Fear where the Key resided.
Skylanders: Spyro versus The Mega Monsters
Hugo reappeared in Spyro versus The Mega Monsters, trying to get the attention of Master Eon and the Skylanders present about the book he had in his possession the Warrior Librarians of the Eternal Archives were coming for. He was also terrified at the fact that they were mega-sized sheep terrorizing a part of Skylands Drill Sergeant where was sent to investigate.
Skylanders: Gill Grunt and the Curse of the Fish Master
WARNING: This section contains spoilers below!(Skip section)
Hugo was present with Spyro, Gill Grunt, Master Eon, and Lead Curator Wiggleworth to look into the Book of Power Kaos was after in the previous adventure. Upon learning that the evil Portal Master was after the Mask of Power, the Mabu stayed with Master Eon and Spyro to look into more of the Book of Power for details on the Mask fragments' whereabouts.
Spoilers end here.
Skylanders: Spyro's Adventure
Hugo was present with Master Eon when Kaos and The Darkness approached, and was told by Eon to take his station to hide for cover. He managed to survive Kaos's initial attack and the destruction of the Core of Light by hiding under a rocky hatch that was his station. Hugo was later called by Eon to seek out the new Portal Master and the Skylanders on the Shattered Island, and later helped the Skylanders to rebuild the Core of Light by guiding them on their journey to find the Eternal Sources.
After Kaos was defeated, Master Eon gave Hugo the honor of banishing Kaos. The Mabu eagerly accepted the offer and sent the evil Portal Master to Earth using the Core of Light.
Informed by Master Eon, Hugo approached Flynn and Cali when they were in the docks near the Dread-Yacht, informing them of a new danger coming to Skylands and that a new Portal Master, the Skylanders, and Giants will help out. The Mabu soon sees Flynn and Cali off to their adventure, remaining at the Ruins.
In the 3DS version, Hugo takes part in helping out the Skylanders by using a machine called the Portaltron 9000 to help summon the Skylanders into the game and help the Portal Master stop Captain Frightbeard.
Concept art of Hugo
Hugo's dialogue picture box in the Xbox 360 and PS3 version
It is mentioned by Cali that Hugo claimed that he built the Core of Light, until he admitted that it was the Ancients who built it.
If Hugo is attacked on the Shattered Island in the Wii version, or the Ruins in the PS3/Xbox 360 versions, he explains to the Portal Masters why the non-playable characters cannot die when they are attacked.
Hugo's voice actor, Michael Yurchak, is known for voicing Jet the Hawk in the Sonic The Hedgehog games since 2010.
↑Skylanders: Master Eon's Official Guide, page 103