Pikmin 2.5/Treasure Hoard

All 301 treasures in Pikmin 2.5. 181 have been named so far.

Juicy Banquet Series
These treasures are all kinds of fruit; all of which appeared in Pikmin 3. There are 12 treasures in this series:

Nutritious Greens Series
These treasures are all kinds of vegetables, such as peppers and roots. There are 8 treasures in this series:

Natural Scenery Series
All of these treasures are forms of plantlife. There are 8 treasures in this series:

Fattening Series
All of these treasures are basic food products. There are 7 treasures in this series:

Sealed Luxuries Series
All of these treasures are food and drink containers. There are 18 treasures in this series:

Dream Sweets Series
These treasures are all candy and sweets. There are 15 treasures in this series:

Sea Bounty Series
These treasures are all things that wash up on beaches, such as shells. There are 9 treasures in this series:

Buried History Series
Each of these treasures is some kind of ancient item. There are 19 treasures in this series:

Application Series
All of these treasures are school supplies. There are 10 treasures in this series:

Fun Trinkets Series
This series is comprised of various toys and knickknacks.

TBD

Active Toys Series
Every one of these treasures relates to some type of sport. There are 6 treasures in this series:

Spooky Series
All of these treasures are Halloween related items. There are 8 treasures in this series:

Modern Utilities Series
All of these treasures are common household items.

TBD

Medical Discoveries Series
These treasures are all medical products.

TBD

Repair Kit Series
All of these treasures are tools. There are 6 treasures in this series:

Technological Series
Each of these treasures is a kind on technological object or component.

TBD

Unknown Energy Series
These treasures are composed of batteries. There are 5 treasures in this series:

Ancient Currency Series
These treasures are all forms of currency. There are 9 treasures in this series:

Extraterrestrial Logo Series
Each of these treasures is a pin/badge with a logo on it.

TBD

Nostalgic Memories Series
All of these are Nintendo related items. There are 13 treasures in this series:

Astral Beauty Series
These treasures are all star-cut crystals, a reference to Paper Mario:The Thousand Year Door's Crystal Stars. There are 7 treasures in this series:

Explorer's Buddy Series
All of these treasures are parts of the Exploration Kit in Pikmin 2, aside from 3 new ones which give new abilities. There are 16 treasures in this series:

*SPOILER* Series
These are all treasures from SPOILERS