Vishnu and Krishna

“The Supreme Personality of Godhead will appear on the earth very soon along with His supreme powerful potencies, and as long as He remains on the earth planet to execute His mission of annihilating the demons and establishing the devotees, the demigods should also remain there to assist Him.” (Message of Lord Vishnu to Lord Brahma and the demigods, Krishna, The Supreme Personality of Godhead, Vol 1, Ch 1)