Return to the Heart (quest series)
Spoilers may be contained on this page.
"Return to the Heart" is an "The Island Mystery' quest series with a total of two quests. It is unlocked after the player has reached friendship level 20 with 
Big Challenges and friendship level 10 with 
TOPHAT. The player must have also completed the "What Goes Up..." quest series and it has been at least one day since completing the "Up in the Clouds" quest series. Additionally, the player must have given greater than or equal to 15 
Spirit Hearts to the 
Island Spirit.
After completing each quest in the series, the player must wait until the following day to start the next quest.
Return to the Heart: Part 1
Quest Description
"It may be time for the Island Spirit to meet her oldest friends..."
Quest Information
The player speaks with 
Cinnamoroll, who tells the player that the Island Spirit wants to see them. The player must then go to the Heart of the Island to see the Island Spirit. She will explain to the player that, because of how wonderful it has been to get to know everyone on the island, she now feels ready to see her oldest and best friends, TOPHAT and Big Challenges.
Afterwards, the player must then speak to Big Challenges and TOPHAT on the beach of 
Seaside Resort. Big Challenges is super excited to see the Island Spirit again. However, TOPHAT is worried about hurting her again. Big Challenges says he has learned to be patient, so he can wait for TOPHAT to be ready. He also suggests that TOPHAT talk to someone who knows about being brave. The player suggests 
Keroppi.
The player and TOPHAT then go to speak with Keroppi, who suggests that TOPHAT should face his fears. The player and TOPHAT must then meet Keroppi by the Haunted Mansion in 
Spooky Swamp. When speaking with him, he'll tell the player and TOPHAT to close their eyes, and when opening them, three 
Nuls in 
Ghost Costumes appear, surrounding everyone. TOPHAT does not get scared of the Nuls because, he says, the Ghost Costumes were thought up by Big Challenges in the first place.
Keroppi continues to brainstorm until he comes up with a new idea: to ride the 
Mount Hothead rollercoaster! The player meets Keroppi and TOPHAT at the 
Upper Ruins Entrance, then speaks to Keroppi. Everyone takes an exciting ride down the Mount Hothead rollercoaster and exit at the Hot Springs. Keroppi will exclaim that TOPHAT had not actually looked scared. TOPHAT explains that he is scared of the emotions involved in the situation, and it is not enough like being scared of a place or a ride. Keroppi suggests they need the hlp of 
Pochacco, since he is an amazing coach. Pochacco appears and, after listening to what the problem is, tells everyone to meet him tomorrow.
Return to the Heart: Part 2
Quest Description
"It may be time for the Island Spirit to meet her oldest friends..."
Quest Information
The following day, the player will meet Big Challenges and TOPHAT on the beach of Seaside Resort. TOPHAT will say that he's nervous for what Pochacco has planned for the day. Then, Pochacco and Keroppi arrive. Pochacco tells everyone to follow him for a climb up 
Gemstone Mountain! The player, Keroppi, and TOPHAT, must then follow Pochacco. Once following Pochacco, the player will arrive on the western side of the Gemstone Mountain beach. The player must then talk to Pochacco. Afterwards, the player, Keroppi, and TOPHAT, must then follow Pochacco again to the Icy Peak Entrance and talk to Pochacco. He'll say it's time to climb the 
Icy Peak! TOPHAT is nervous because this is where he lost his friend, Big Challenges. Pochacco says to meet at the 
Happy Hideaway! Once arriving at the Happy Hideaway, the player must then speak to the group. TOPHAT will now feel more confident about going to see the Island Spirit. Afterwards, the player must then meet Big Challenges and TOPHAT on the beach of Seaside Resort, again. After speaking to Big Challenges and TOPHAT, it will be time to travel to the Heart of the Island to see the Island Spirit.
Once the player has travelled to the Heart of the Island to see the Island Spirit, Big Challenges and TOPHAT will greet her and they will discuss the reasoning behind their hurtful actions to one another and they will each forgive each other. Afterwards, the Island Spirit will be free to explore Friendship Island. Everyone will meet on the beach of Seaside Resort and celebrate the Island Spirit's freedom. However, there seems to be a mystery brewing... the letter 
Wish me mell had to deliver to the Island Spirit is revealed... which asks her to take care of the neighborhood and is signed as "I.I.". Of course, 
Chococat is excited for the brand new mystery that awaits!
"Hello, Friend!" End Cutscene
After completing the "Return to the Heart (quest series)" the end cutscene for the quest is able to be replayed an unlimited number of times when visiting the Heart of the Island.