Complex sentence: During one part it flashes back through some previous Mario games, showing him battling Bowser in Super Mario Bros., fighting Iggy Koopa in Super Mario World, and swinging Bowser by the tail from Super Mario 64.
Split into simpler sentences: During one part it flashes back through previous Mario games, showing him battling Iggy Koopa in Super Mario World. In another part it shows him swinging Bowser around by the tail from Super Mario 64.