The Angry Beavers (1997)

S2E4 Fakin' It

Norb pretends to be ill, hoping Dag will cater to his every need. However, Dag quickly catches on and decides to turn the situation around by feigning his own sickness. As the two engage in this game of deception, their friendship is put to the test, leading to hilarious antics and unexpected revelations about each other's true intentions.