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Omega Aniimo: How World Bosses and Raids Work
Omega bosses can't be caught. You fight them to unlock evolutions like Infergon and Sherro, and Omega Tukken gives you three attempts a week.
The short version
- Omega Aniimo are major boss encounters that cannot be captured, so you fight them for what they unlock rather than to add them to your team.
- Infergon only comes from evolving Helmwhelp, and that evolution requires defeating Omega Infergon in its quest arena at the end of the Russet Highlands Warrior story quest.
- Evolving Sherro or Sheldon requires defeating Omega Sherro.
- Omega Tukken is a weekly boss you can challenge three times per week.
- Beating Alpha and Omega Aniimo at a higher World Level gives better rewards, and beating them three times with a friend raises friendship affinity.
Aniimo has two tiers of oversized boss creature. Alpha Aniimo are world bosses you can try to catch. Omega Aniimo are the bigger encounters, and they cannot be captured at all.
That changes why you fight them. An Omega boss is not a new team member. It is a gate: several Aniimo evolutions stay locked until you beat a specific Omega, and one of them comes back every week as a raid with a fixed number of attempts.
This page covers what separates Omega from Alpha, which Omega fights unlock which evolutions, how the weekly boss works, and how to get more out of each kill.
Omega and Alpha Aniimo are different kinds of boss
The collectible creatures in the game are called Aniimo, and the two boss tiers are built on them. Alpha Aniimo are oversized variants of standard Aniimo: physically larger, stronger, and usually already evolved. They work as world bosses, and beating one gives a substantial experience bonus, loot, and in some cases an evolution path for a specific Aniimo.
Omega Aniimo are the major boss encounters, and the key rule is simple. You cannot capture them. Omega Infergon, fought at the end of the Warrior quest, is the clearest example.
Capture attempts on Alpha and Omega world bosses consume energy or electricity. Since an Omega can never be caught, treat an Omega as a fight and save your capture attempts for Alphas.
You also don't meet Omega bosses straight away. They become available later in progression, and each one is unlocked by finishing a specific quest.
Alpha Aniimo
- Oversized variants of standard Aniimo
- Physically larger, stronger and typically evolved
- Defeats yield substantial experience bonuses
- Defeats yield loot and unlock evolution paths
Omega Aniimo
- Major boss encounters that cannot be captured
- Become available later by completing specific quests
- Defeating certain Omega bosses unlocks evolution paths
Aniimo evolution through Omega bosses
Some Aniimo evolutions require you to defeat wild specimens of that same Aniimo. Depending on the creature, that can mean beating several of them, or beating its Alpha or Omega form. Certain Omega bosses exist mainly for this: defeating them unlocks evolution paths for specific Aniimo.
Infergon is the main example. You only get it through evolution, by evolving Helmwhelp, and that evolution requires defeating Omega Infergon in its quest arena. The route is the main storyline, which starts with a helmet quest from Painter Sora. Omega Infergon waits at the arena at the end of the Russet Highlands Warrior story quest, at the top of a mountain in Russet Highlands. Once that quest is finished, you can return to the arena and fight it. The evolution itself happens at the sword, and starting it begins the fight with Omega Infergon, which you have to win.
Sherro works the same way. Evolving Sherro or Sheldon requires defeating Omega Sherro, so if either of those is on your team, that fight is on your list.
Weekly raids: Omega Tukken
Not every Omega is a one-off story fight. Omega Tukken is a weekly boss, and you can challenge it three times per week.
Those attempts are a limited resource, so it pays to bring your strongest team rather than spending them on test runs. The friendship system gives you another reason to raid with someone. Defeating Alpha or Omega creatures together with a friend three times raises your friendship affinity, which means a week of Tukken runs with the same partner covers both jobs at once.
3
Omega Tukken challenges per week
World Level makes every boss kill worth more
Defeating Alpha and Omega Aniimo at higher World Levels gives greater rewards. The same fight is worth more once you've raised it.
World Level helps outside boss fights too. Wild Aniimo you capture after raising it come in at higher levels, which cuts down on grinding experience. Combined with the experience bonus from Alpha kills, a higher World Level is the quickest way to get a team ready for the Omega fights that gate its evolutions.
Where to start
Spend capture energy on Alphas, not Omegas. Push the story to the Russet Highlands Warrior arena if you want Infergon, beat Omega Sherro if you're raising Sherro or Sheldon, and use all three weekly Omega Tukken attempts, with a friend if you can.
Most of this page was re-checked against the released game on 3 October 2026. The rest has not been re-confirmed since release.
