The Dark Heart of Friendship - S4-E25
Continuity mistake: Asuramon's faces keep changing positions. One shot his yellow/happiness face is on the left, the next it's on the right, and the same goes for his blue/sadness face.
The Crest of Sincerity - S1-E17
Continuity mistake: In the scene where the DigiDestined are running towards a cactus mirage, Patamon is visible instead of Tokomon. (00:03:20)
Answer: He was in pain from the black gear that was stuck inside of his body.