There are nine recurrent characters in LazyTown, all but three of them played by puppets.
Adorkable: While Sportacus is conventionally attractive, well-muscled and very fitness-oriented, many fans consider him adorkable due to his constant optimism, boyish over-excitement, hopeless naiveté and awkward English. His baby-blue eyes and cheesy grin only help the matter.
The Cast Showoff: Sportacus showcases Scheving's amazing stunts and talent as a gymnast, to the point where the character won't simply walk anywhere - instead he'll flip, somersault, walk on his hands, cartwheel, etc. just to get to wherever he needs to be. Granted, the show was created by Scheving himself, but still...
Kryptonite Factor: Sportacus' is sugar; eating any sugary food renders him immediately comatose, and fresh fruit (which contain quite a bit of sugar.) or vegetables (a classification that includes a handful of "sugary" foods, most prominently the sugar beet) are required to restore him.
Lightning Bruiser: Although since the show is aimed at pre-teens he never actually engages in violence.
Ambiguously Gay: Despite claiming to hate Sportacus and wanting him to leave the town, Robbie sure spends a lot of time talking about Sportacus, touching Sportacus and jumping into his arms whenever the slightly-above-average hero shows up.
Brilliant, but Lazy: Robbie is the epitome of this trope. He prides himself in being lazy, and even schemes to make the rest of the town as lazy as he is, yet he is easily the most brilliant person in the entire town and is able to create anything out of anything. Ironic, seeing that due to Robbie's constant attempts to make Lazy Town lazy via elaborate traps, machines, and costumes, he becomes one of the most active residents.