main boss in the same area or level. Some minibosses are stronger versions of regular enemies, as in the Kirby games. Others may be a recurring version of a previous boss, who is either weaker than previously encountered or is less of a challenge later in the game due to character or equipment progression. Other video game characters who usually take the role of a miniboss are Vile (Mega Man X series), Allen O'Neil (Metal Slug) and Dark Link (The Legend of Zelda series, though he appears as a final boss in Zelda II: The Adventure of Link). There is also a subtype nicknamed the "Wolfpack Boss", for its similarity to a pack of wolves, often consisting of a group of strong normal enemies that are easy to defeat on their own, but a group of them can be as difficult as a boss battle. Superboss A superboss is a type of boss most commonly found in role-playing video games. They are considered optional enemies and do not have to be defeated to complete the game. However, not all optional bosses are superbosses. They are generally much more powerful than the bosses encountered as part of the main game's plot or quest, more difficult even than the final boss and often the player is required to complete a sidequest or the entire game to fight the superboss. For example, in Final Fantasy VII, the player may choose to seek out and fight the Ruby and Emerald Weapons. Some superbosses will take the place of the final boss if certain requirements are met. This is common in fighting games such as Akuma in Super Street Fighter II Turbo. Some superbosses can also yield special items or skills that cannot be found any other way that can give a player a significant advantage during playthrough of the rest of the game, such as added experience or an extremely powerful weapon. For example, the "raid bosses" from Borderlands 2 give rare loot unavailable anywhere else. Some superbosses in online games have an immense amount of health and must be defeated within a time limit by having a large number of players or parties working together to defeat the boss. Examples of such superbosses can be found in games like Shadow Fight 2 and Star Wars: Galaxy of Heroes. Toby Fox's games Undertale and Deltarune both feature superbosses in the form of Sans the