When the Death Egg crashes on Angel Island, Knuckles is briefly tricked by Dr. Robotnik and thus allows Robotnik to place his robot armies on the island and construct a base to rebuild his Death Egg.
When the Death Egg crashes on Angel Island, Knuckles is briefly tricked by Dr. Robotnik into believing Sonic was a dangerous villain who plots to steal the Emeralds. The echidna thus allows Robotnik to place his robot armies on the island and construct a launch base to rebuild his Death Egg.