Terrakium is a Fighting and Rock-type Legendary Pokémon from the Unova region. It is available in Pokémon GO. Like all Legendary Pokémon that appear in Raid Battles, Terrakium only appears in Five Star Raids, making it difficult to defeat and capture.
Defeat Terrakium
After finding a Raid Battle with Terrakium as a Raid Boss, you'll need to defeat her in battle before you can attempt to catch her. Because it's difficult, you should only attempt it with a good number of teammates, at least 10-15, if not more. You will earn The Strength bonus by teaming up with The people on your Friends list. So bring the friends, if you can.
When choosing which Pokemon you will use in battle, there are a few things to keep in mind. First of all, considering how powerful Terrakium is, you should only use The Pokémon that have a CP below 2, ideally closer to 000 or even higher. Remember that Terrakium is a fighting and rock type, which makes it weaker against Water, Grass, Fighting, Ground, Psychic, Steel, and Fairy movements. During this time, he resists Normal, Fire, Poison, Bug, Rock, and Dark moves.
If you happen to have Mewtwo, Lugia, Groudon, Kyogre, Dialga, or Palkia, these are the perfect additions to your party when you take on Terrakium. If you're running out of Legends, other good Pokémon include Metagross, Carchacrack, Rhinastock, and Leviator.
Catch the Terrakium
If you and your teammates succeed in defeating Terrakium, then you will have the chance to attempt to catch up with him. Depending on your performance in combat, you will receive several Premier balls. You will only be allowed to use these Premier balls when attempting to catch that Legendary Pokémon, and not any of your Poké, Great, or Ultra balls.
Since the number of Premier Bullets you receive comes from your combat performance, there are a number of ways you can do things to optimize the number of Premier Bullets you receive. First, just battling your strongest Pokémon, dealing as much damage as possible, will net you Prime Bullets. You will also get it if you team up with The friends on your Friends list, or The members of your Colored Team when you face Terrakium in battle.
As far as Terrakium goes, it works like any other Pokemon. You throw your Premier balls trying to land them in the circle to increase your chances of catching them. However, Terrakium will move a lot more on the screen than most The Pokémon, which will make them a difficult target to hit. Additionally, even if you manage to hit Terrakium with a Premier bullet, her insanely low catch rate will make her very likely to come out of your Premier bullet anyway.
To increase your chances of catching some Terrakium, you can use a Golden Razz Berry to increase its catch rate. The regular berries of the Razz will also increase his catch rate a bit, but the berries of the Golden Razz will help a lot more. However, even with this increase, Terrakium's catch rate will remain meager. Expect it to come out of most, if not all of the Premier balls you throw.
There's a good chance Terrakium will manage to escape capture, even if you do everything right. If that happens, you'll need to find another raid fight featuring the Legendary Pokémon and try again with another Raid Pass.