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Deino first appears at the side of Pawniard in Toy Town. When the player has won the Battle Royale in Trailhead Field, Pawniard, Deino, and Vullaby disappear from Toy Town and most of the Glowdrops from the fountain disappear as well. Lillipup and Scraggy suspect them of having taken the Glowdrops. Pawniard, Deino, and Vullaby are encountered at the start of Seabreeze Trail. The Panpour of Seabreeze Trail's Battle Royale says that they were just there after the player beats the same Battle Royale. Panpour refers to them as "dunces". They are encountered at the start of Echo Valley as well. The team go through Echo Valley's gate when it opens for other challengers. Deino is one of the rivals in the Challenger's Ground Battle Royale Semi-Finals. After the player becomes the Battle Royale Champion, Pawniard reveals that he, Deino, and Vullaby did not steal the Glowdrops. They are next seen in in Shimmering Lake's Battle Royale stadium. They appear again in Firebreathing Mountain's Battle Royale stadium.