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WithinPokemon Legends: Arceus, there are over 100 optional side missions known as Requests. Completing each of them isn’t necessary to beat the main story, but players should take the time to work on them. Requests offer up rewards, and there’s even a Request that gives players a free Pokemon. Most Requests involve completing a Pokedex entry, which can be simple but tedious if players don’t know where to look. Request 53 is unlocked at the midway point of the game and requires the “help” of the Water-type Octillery.
Even if players don’t want an Octillery on their team, they’ll need to catch one to complete the final Story Mission inPokemon Legends: Arceus. Thus, they may as well complete the optional Request 53. Players will need to get Octillery’s Research Level to 10. Luckily, there’s a quick way to do this.

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Unlocking Request 53
Octillery can be found at theCobalt Coastlands,which players will visit upon starting theMission: The Lordless Land. However, simply unlocking Cobalt Coastlands isn’t enough to unlock Request 53. Players will need toget the Ride Basculegion from Iscan. This can be done by working through The Lordless Land Mission.
There’s one more requirement as well. Players will need to have completedRequest 12: A Perfect Pickling Stone. This sidequest is available as soon as players gain access to all of the Obisidian Fieldlands. So, if players are diligent about doing side quests, there’s a high chance they’ve already completed this Request by the time of visiting the Cobalt Coastlands. If not, here’s a brief rundown:

Once this is finished, and players have the Ride Basculegion, return to Jubilife Village. Radisa will have moved to theleftmost house by the Jubilife Gate. If she has a Request Icon over her head, then that means players will be able to start Request 53. This time, Radisa will want to see Octillery’s completed Pokedex Entry.
To complete a Pokedex Entry inLegends: Arceus, players will need tocomplete a series of Research Tasksto get the Pokemon to Research Level 10. At this point, players should be familiar with the formula, so return to theCobalt Coastlandsafter getting Request 53.
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Completing Request 53
Research Tasks can be viewed by going into the Pokedex (right on the D-Pad) and tapping A over a Pokemon’s icon. Some Research Tasks are marked with a red arrow, which means players will get two Research Points for completing one of the Task milestones.
For example, “Number caught” is one of Octillery’s Research Tasks. CatchingoneOctillery would normally giveone Research Pointif the “Number caught” wasn’t marked with the red arrow. Because itismarked with the red arrow, that means catching one Octillery will givetwo Research Pointsinstead.
Here’s a quick way to complete Octillery’s Pokedex entry for Radisa:
Red Arrows (i.e: double the research points)
Number caught
1, 2, 4
Times you’ve seen it use Hyper Beam
1
Number of alpha specimens caught
Yes
As mentioned, Octillery can only be found in theCobalt Coastlands. Specifically, players can find a group of Octillery onIslespy Shorewhilea level 46 Alpha Octilleryroams the edge ofCastaway Shore. The Alpha Octillery can be battled before players unlock the Ride Basculegion. Players hoping tocatchthe Alpha Octillery will need to be at Rank 4.
For those that dohave the Ride Basculegion, swim around (or through) Veilstone Cape to the northmost part of the Cobalt Coastlands. There, players can find regular-sized Octillery at the tip ofIslespy Shoreand on the rocks where the male Basculin can be caught. Players can try using lures to distract the Octillery before catching it, or they can charge right in and battle.
Here’s another way of getting Octillery’s Pokedex Entry without catching the Alpha Octillery:
Number defeated
1, 2
Number you’ve defeated with Electric-type moves
1, 3
Once players have farmed enough Research Points, they’ll need to report to Professor Laventon to undo the final lock. With Octillery’s Pokedex entry completed, players can now speak to Radisa at Jubilife Village to finish Request 53. As a reward, players will receivex5 Bean Cakesandx1Exp. Candy M.
Bean Cakes are a type of lure/bait inLegends: Arceus. They’re ideal when trying to catch fish Pokemon or bird Pokemon (such as the Water-type Piplup). Players can also buy the Bean Cake recipe from the Crafting Shop in Jubilife Village. Exp. Candy M is a stronger version of the Exp. Candy S. If a Pokemon is a low-level, then feeding them an Exp. Candy M may elevate their level by two or three.