Reference

Some treasures are cameos to other Nintendo series. These include:

• The Flame of Tomorrow exhibits the text 'Bowser Breath Brand' with a picture of Bowser.
• The Master's Instrument says 'Mario paint', a possible reference to the game Mario Paint.
• The Decorative Goo, bears the label 'Mario Paint--Blue'.
• The Unspeakable Wonder resembles Princess Peach's crown.
• The Cosmic Archive is the Japanese Famicom game Nazo no Murasamejo.
• The Dream Architect is a Game & Watch.
• The Implement of Toil says 'Nintendo 64' on it.
• The Remembered Old Buddy is the head of a NES R.O.B., the gyro blocks being R.O.B. blocks.
• The Gyroid Bust is, although fairly altered, featured in the Animal Crossing series.
• The Key resembles the secret exit key found in Super Mario World.
• Pokos resemble coins from the Mario series.

Many Pikmin 2 treasures are real-world items, with real-world brands. For example:

• Dr. Pepper is the drink of the bottle cap known as the Drought Ender in-game.
• The Abstract Masterpiece is a Snapple lid.
• The Gherkin Gate is a Vlasic brand lid.
• The Salivatrix is a Dannon yogurt lid.
• The Quenching Emblem displays the 7up logo.
• The Pondering Emblem (NTSC) and Massive Lid have the brand 'Yoo-Hoo', another possible reference, this time to Yoohoo chocolate drink.
• The Alien Billboard is a Kiwi brand shoe polish lid.
• The Boss Stone is a gyokushō piece from the Japanese board game Shogi, also called "Japanese Chess."
• The Yellow Taste Tyrant is a French's mustard lid.

Other such cases are the items in the Mystical Energy Series, which are all Duracell batteries.