The Mario series is another one that's filled with a number of different hidden surprises. One of the most notorious comes from Super Mario 64. After completing the game fully, by getting all 120 of the game's available stars, you unlock a cannon in the castle's front courtyard. You can use the cannon to get up onto the roof of the castle, where you'll encounter Yoshi, Mario's lovable dinosaur friend. Yoshi fully stocks your lives, although it's a little unnecessary at this point. Despite the pointlessness of the encounter, it was still considered a rite of passage to meet up with Yoshi in Super Mario 64, since it required so much regular gameplay, and it required familiarity with the rest of the franchise.