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. A superboss is a type of boss most commonly found in role-playing video games. They are considered optional enemies, though optional bosses are not all superbosses and do not have to be defeated to complete the game. 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 "". Toby Fox's games "Undertale" and "Deltarune" both feature superbosses in the form of Sans the Skeleton (only accessible by making it to the end of "Undertale"'s "Genocide Route") and Jevil (only accessible by locating a set of keys to free him from a prison cell), respectively. The final boss, or end boss, is typically present at, or near, the end of a game, with completion of the game's storyline usually following victory in the battle. The final boss is usually the main antagonist of the game; however, there are exceptions, such as in "Conker's Bad Fur Day", where the final boss is the antagonist's alien pet. Final bosses are generally larger, more detailed, and better animated than lesser enemies, often in order to inspire a feeling of grandeur and special significance from the encounter.