Ass Pull: Fox's old foe, Andross, was thrown in as the final boss very late in development, and appears to hijack the games plot without any real buildup or foreshadowingó-it doesn't even explain how he survived the final battle in Star Fox 64. Making this hasty addition more obvious is that hacking into game reveals that an entire fight sequence between Fox and the main villain of the game, General Scales, had been programmed, complete with dialogue already recorded.
Ensemble Darkhorse: Krystal, sort of. She definitely has a pretty solid fandom, and is even one of the more requested characters for the Super Smash Bros. series. Her Hatedom dying down quite a bit over the years has probably helped.
Link can turn into a wolf, which is a canine like Fox, and is the same species as scrapped protagonist Sabre. Relatedly, both characters are imprisoned at one point and can only escape by using an alternate physical form (Link taking advantage of his then-new wolf form, Fox turning into a SharpClaw thanks to an invention by Slippy).
Both Link and Fox bid a bitter farewell to their respective sidekicks, Tricky and Midna, after their adventures conclude.
The protagonists of both series being playable in all four Super Smash Bros. games while the newly-introduced female leads of both games (Midna and Krystal) make cameo appearances (Midna as an Assist Trophy, and Krystal as one of the special speaking characters on Lylat Cruise).
Even more amusingly, both games are regarded exactly the opposite way by their respective series' fanbases: Twilight Princess is sometimes criticized for being too formulaic for a Zelda game, while Star Fox Adventures is criticized for being too much of a departure from the rest of the Star Fox series.
The Lightfoot Test of Strength, which only the most button-mashing-happy will have some chance of beating it the first time off.
The Krazoa Test of Fear will make even the most patient gamers toss their controllers in a fit of rage, as it is an Unexpected Gameplay Change to a focus based minigame where the player must keep a line inside a bar as it swings from side to side wildly with little input as to where it's going to swing. It lasts a full minute and if you fail you have to go all the way back to the start. Not to the start of the Test itself, but instead all the way back to the beginning of the area and have to go through all the, admittedly easy if tedious, puzzles all over again. To say it grinds on the nerves is an understatement.
The mission to protect a Thorntail's egg nest from incoming reptilian thieves, until you learn that the easy way to beat it is to use your Groundquake (which miraculously doesn't crush the very eggs you're supposed to protect).
Viewer Gender Confusion: It's not uncommon to hear fans refer to the Shopkeeper as a "she". The character is actually male, but he has a voice that makes him sound like an old woman (which is actually provided by a man).