Flippy-Flaky Relationship

Flippy and Flaky are depicted in the series to be friends. There are many fan-fics which show them as a couple, though it is NOT true to the series. However, there are some clues which indicate Flippy may have feelings for Flaky, even in his evil state.

Interactions
In earlier episodes such as This is your Knife, Keepin' it Reel, and Hide and Seek, Flippy's flipped-out persona would kill Flaky as he did with any other character. Although by the TV series, this has changed.

Party Animal
Flaky is seen preparing a surprise party for Flippy, along with several other characters. When Flaky hands Flippy a cake knife, Flippy almost flipped out due to the knife, though didn't. Unfortunately, he later flipped out from the popping of balloons and killed many of the guests. After killing Mime, he was caught between Flaky (who was in plain sight and unable to move, thus a perfect target) and Sniffles hiding in a barrel. For some unexplained reason, he went to kill Sniffles instead.

Double Whammy Part 1
Flippy flipped out from the plane ride, followed shortly by the murdering of Disco Bear, Petunia, and Giggles. At the sight of this gruesome scene, Flaky let out a scream which snapped Flippy out of his evil state. This may indicate that Flaky is more powerful than his evil state, and this carries on further in the later internet episodes.

Without A Hitch
While Flippy hitches a ride in Flaky's car, the latter has hallucinations of flipping out and killing her. However, Flippy did no such thing in reality. As a matter of fact, Flippy intended to save Flaky after crashing by trying to cut her seat belt. Ironically, it was Flaky who killed Flippy (with Lumpy's help) after being startled by his knife.

Random Acts of Silence
Despite that this was only a brief interaction, it makes a significant point. Flaky returned a book to Flippy, who was in his evil state and standing right in front of her, though apparently did not kill her like he did with the other characters.

Trivia

 * As of currently, Flaky and Flippy are not a love couple as depicted by fans.