IVs and EVs

IVs and EVs in Polished Crystal have hybrid mechanics of the vanilla and Gen. III+.

Since IVs in Gen. I and II have historically been referred to as "determinant values" (DVs) due to their numerous roles, Polished Crystal documents often call IVs "DVs"; conversely, "stat experience" (Stat EXP), EVs' counterpart in Gen. I and II, won't appear due to the dissimilarity.

Contents

• Contents
• IVs
  • Hyper Training
• EVs
  • Power Items
  • EV Training Spots
    • Wild Encounters (Pre-E4)
    • Special Rematches (Post-game)
• Stats Judge

IVs

IVs in Polished Crystal range from 0 to 15, stored for each of the six stats (instead of four).

• IVs determine the type of Hidden Power using the parity of the six numbers as in Gen. III+. (hidden_power.asm)
  • Only on Modified, Fairy-type Hidden Power is now available.
• The gameplay preferences have two IV-related options:
  • Color variation: IVs will affect the coloration of all Pokémon, both Shiny and non-Shiny. (vary_colors.asm)
    • The IV-based color variation is distinct from Shininess. Shiny Pokémon appear with the dedicated animation and the star-shaped icon as in FR/LG and later.
    • It uses complicated calculations so players can't predict IVs from the tints and shades. It's NOT "the closer to the original the better" situation, though Perfect-IV Pokémon result in the original coloration.
    • It was inspired by Stadium's nickname-based system.
  • Perfect stats: All Pokémon, both yours and your opponents', will be treated as if fully Hyper-Trained. The actual IVs are still reserved for things determined by them.
• IVs are independent from Shininess, Gender, or forms, as in later Generations.

Hyper Training

Hyper Training is available at Celadon Hotel, a Gen. VII+ function that puts an IV modifier for a stat to be treated as if it had the highest. Give a Bottle Cap to Mr. Hyper in the hotel to have him Hyper-Train a stat of your Pokémon. Polished Mr. Hyper no longer requires Lv. 100 and now trains the IVs of a stat of maxed (252) EVs. The Bottle Cap is grind-able by Fishing.

EVs

EVs in Polished Crystal max out at 252 for each stat. Each species has an ev_yield for the amount of points to be given to EVs when defeated, which is now shown in the Pokédex.

The gameplay preferences has the EV gain option:

• 510 ensures the modern limit of 510 EVs in total;
• All uncaps the total EVs, allowing a Pokémon to have 252 EVs for all six stats; and
• No completely disables EVs.

Power Items

The Power items are available in this game: three in pre-E4 and the rest in post-E4. Also, their EV boost now applies to the Exp. Share holders as a previously oversight QoL feature. A Power item with five Exp. Shares is the fastest way to raise EVs. EV grinding isn't necessary in a regular playthrough but should be used for Polished Battle Tower challenges.

Item	Stat	Guest	Location
Power Weight	HP	Cheryl	Murky Swamp
Power Bracer	Atk	Riley	Dim Cave
Power Belt	Def	Buck	Cinnabar Volcano
Power Lens	SpAtk	Mira	Scary Cave
Power Band	SpDef	Anabel	Battle Tower Outside
Power Anklet	Spe	Marley	Quiet Cave

EV Training Spots

Wild Encounters (Pre-E4)

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• HP: Surf in the water behind the counter in Cliff Edge Gate to encounter only Wooper and Quagsire.
• Special Defense: Surf at either New Bark Town, Cherrygrove City or Olivine Port to encounter only Tentacool and Tentacruel.
• Speed: Surf at Blackthorn City to encounter only Magikarp. Alternatively, spam Old Rod or Good Rod at most towns to encounter only Magikarp and Poliwag.

Special Rematches (Post-game)

The guest Trainers who give you a copy of the Power items will go to Battle Tower 2F for post-game rematches. They all feature the corresponding stat:

• Cheryl: HP +17
• Riley: Atk +18
• Buck: Def +14
• Mira: SpAtk +18
• Anabel: HP +2, SpDef +14*
• Marley: Atk +2, Spe +13*

* Updates on the party are in progress. Although Anabel's Snorlax and Marley's Arcanine are both iconic, they'll have to give way to the EV-training convenience.

Stats Judge

The Judge program has now been installed at Goldenrod PCC. The machines at the right side of the floor** display a hexagon chart of IVs and EVs of a Pokémon in your party. As the engineer expresses his hope for Breeders, you need to breed an Egg (NOT hatching gift Eggs) to unlock the Judge.***

** They were originally News Machines for paid online news letters as well as mini-games, quizzes, and rankings.

*** In Alola, 21 Egg hatches were requried for the Judge.