Jan is known for completing so-called "hardcore" Nuzlocke Challenges on Twitch, which are self-imposed challenges of Pokémon games aimed at increasing the difficulty of the game.[4][5] His Nuzlocke challenges include further restrictions compared to the traditional ruleset, such as level caps and no items in battle.[6] In 2016, Jan completed a permadeath solo run of Pokémon FireRed using only a Rattata, one of the game's weakest characters.[7]
Jan's YouTube and Twitch channels significantly gained traction in 2020, following a reaction video to a Nuzlocke attempt by Jaiden Animations.[4][6] During the same period, Jan was attempting the Nuzlocke challenge of Pokémon Emerald Kaizo, a ROM hack of Pokémon Emerald, which he beat in 2021.[8] Coincidentally, he completed the challenge in 151 attempts, the exact number of generation I Pokémon.[8]