Ricardio

Ricardio makes his appearance in "Ricardio the Heart Guy". Finn shows a rivalry with him due to the fact that Princess Bubblegum seems somewhat attracted to him, and Finn has a crush on her. This is shown when Finn says to Jake, "I can't compete with that, he's talking about science!". This obviously made him jealous. Finn punches Ricardio in the face once he suspects that he is evil, because he was seen throwing Ice King into a dumpster and carrying rope and broken glass bottles. Ice King then reveals to Finn and Jake that after an experiment gone awry, his heart left his body, and Ice King began to grow weak. He somehow managed to waddle to the Candy Kingdom and tried to convince Ricardio to return to his body. But instead, Ricardio dumps Ice King into a dumpster, and left him for dead. Ricardio's plan was to cut out Princess Bubblegum's heart and force it to marry him. His idea of the forced marriage was similar to that of the Ice King's usual plans. Ricardio ties up Princess Bubblegum later on in the episode and Finn and Jake save Princess Bubblegum. He is returned to Ice King's body at the end of the episode but vowed to return, hinting that he may be seen again later on in the series.

Pen has stated that "he'll see you guys later", making it a high possibility that he'll return in a future episode.

Quotes
See Ricardio/Quotes

Trivia

 * Even though Ricardio is Ice King's heart, he is surprisingly much more evil than Ice King.
 * Due to what he did in Ricardio the Heart Guy, Ricardio is indeed a super-villain.
 * He is voiced by George Takei from Star Trek fame, who has done many voice acting gigs in animated series.
 * Unlike Ice King, Ricardio is popular and well-liked among the Candy People. Princesses also like him, such as Princess Bubblegum and Lumpy Space Princess.
 * His own name is a pun- Ricardo is "Richard" in Spanish- and Cardio is another word for "Heart" in scientific terms.
 * Ricardio only wants Princess Bubblegum's heart, not Princess Bubblegum.
 * Even though Ricardio is an actual heart, he doesn't look like one. Instead, he just looks like the "fun" heart design. However, his early designs show him looking like an actual heart.