* DuelingGames: ''Sonic Rush Adventure'' with ''VideoGame/TheLegendOfZeldaPhantomHourglass''. Released within several weeks of each other, both games involve their respective protagonists getting caught in a storm that washes them ashore in a land they've never seen before with their equipment [[BagOfSpilling destroyed or lost]]. Both games have a ship-building feature and paths across the oceans drawn using the DS's touch screen. The games have incredibly similar color schemes and an annoying new character who cannot pipe down but is good with nautical vehicles. As if that wasn't enough, both games have a haunted ship with a green tinge for their fourth stage.
* WhatCouldHaveBeen: Ryan Drummond was to be cast as Sonic once more, before being replaced with Creator/JasonGriffith.