Friendly Monsters

Use 1 Moonstone on the friendly Feather Circle to receive 30 AP and a Lapis Lazuli. The Lapis Lazuli is then used for the friendly Garuda, so this exchange directly advances the item chain. Do not attack and do not try to Eat it for LV4 Holy; the hostile Feather Circle is the correct Blue Magic target. If you are short on Moonstones, make sure you are not spending the sidequest copy elsewhere before completing this encounter.

Give the friendly Garuda 1 Lapis Lazuli to receive 40 AP and a Diamond. Keep that Diamond: it is the item required by the final friendly Yan. The friendly version never needs to be fought, so there is no reason to prepare for the hostile Garuda's Maelstrom or Stop. Once this exchange is complete, confirm that the previous friendly creatures are also finished before hunting Yan on Vile Island.

Village of Dali, Treno

The friendly Ghost also wants 1 Ore. Give it the item instead of attacking to receive 10 AP and a Hi-Potion. This encounter is separate from the hostile Ghost record, so the Undead item tricks used in normal battles are the wrong approach here. If you are following the intended chain, this is the second friendly creature after Mu and helps build the sequence of rewards needed for the later jewel requests.

Oeilvert, Chocograph 15 - Dusk Plains, Mountain Crack - Dragon's Hair

Give the friendly Jabberwock 1 Emerald to receive 40 AP and a Moonstone. That Moonstone is the key reward because the friendly Feather Circle asks for it next. Do not confuse this with the hostile Jabberwock, which uses Earthquake and can teach Limit Glove. The friendly encounter should end immediately through the item command; there is no advantage in testing attacks or status effects.

Use 2 Ore on the friendly Ladybug and do not damage it. The reward is 20 AP plus an Ether and Echo Screen. Because the hostile Ladybug looks nearly identical, use the special friendly battle music as the cue before selecting the item command. Completing it early is convenient because the Friendly Monsters rewards begin shifting from common Ore requests toward the jewels required by the later creatures.

Village of Dali, Chocograph 3 - Uncultivated Land, Chocograph 13 - Forbidden Forest

Leave the friendly Mu completely alone and use 1 Ore on it. The exchange awards 10 AP plus Eye Drops and a Potion, and it is the natural starting point for the Friendly Monsters chain because Ore is easy to obtain. Attacking it converts a harmless sidequest encounter into a failure, so confirm the special battle music before choosing a command. The reward sequence points toward the later friendly creatures, but you can complete most of them out of order if you already possess their requested items.

The friendly Nymph asks for 3 Ore. Hand them over for 30 AP and an Emerald, which is particularly useful because the Emerald is the item requested by the next friendly Jabberwock. Do not attack or try to Eat this version, the hostile Nymph is the one used to learn Night. This encounter is best treated as a link in the sidequest's item chain rather than as a battle.

Vile Island, Chocograph 23 - Fairy Island

Yan must be the final Friendly Monsters encounter. If any of the other eight creatures are incomplete, it asks whether you found the others and runs away, even if you already have a Diamond. After completing the chain, use 1 Diamond on Yan to receive 50 AP and a Rosetta Ring. Finishing this exchange also changes the Ozma battle: close-range attacks can reach Ozma and its Shadow relationship changes, enabling Doomsday to hurt the superboss instead of simply healing it.

Give the friendly Yeti 2 Ore to receive 20 AP and an Elixir. No combat setup is needed; attacking only ruins the exchange. Yeti is normally encountered after Ladybug in the sidequest's natural progression. If you are collecting AP for abilities, consider equipping Ability Up before handing over the item so the large AP reward is more useful to the characters who still need mastery.