Terastal Phenomenon Rules:
-Utilizing the Terastal Phenomenon requires the Trainer to have a Tera Orb.
-Undergoing Terastallization costs 1 Will Point for the Pokemon being Terastallized
-Terastallization lasts for a whole scene or one battle.
-After being used the Tera Orb loses power and has to be recharged either being time passing or going to a Pokemon Center. Being exposed to high amounts of Stellar-Type Tera Energy can permanently remove the need for a Tera Orb to recharge.
-During the duration the Pokemon transforms its type to solely that of its Tera type. The Pokemon’s weaknesses, resistances, and immunities change to that of their new type, but they still retain STAB bonuses of their original type on top of the one for their new type. If the Tera type matches one of their default types moves of that type get an Extra Die to the damage pool on top of the one received from STAB.
-Pokemon from Paldea, Kitikami, or Unova’s Blueberry Academy Terrarium will usually have a Tera type of one of the default types of the form/evolution they were caught in chosen at random. On rare occasions Pokemon may be found whose Tera type does not match any of their default types.
-A Pokemon’s default Tera type if they are not from the above locations is the Primary Type of the form/evolution stage they have upon first being exposed to Tera Energy. If that Primary type is Normal and they have a secondary type, their Tera-Type is the secondary one instead.
-Tera Type cannot be changed via Form Changes or Evolutions that change type, but Tera Shards can be acquired to change a Pokemon’s Tera Type to any of the 18 normal types plus the Stellar Type.
-Moves and Abilities that change type always fail when used on a Terastallized Pokemon, however if their type was changed prior to that they receive the appropriate STAB bonuses to their changed pre-Tera typing instead of their default one.
Stellar Tera Type rulings:
-Stellar Tera Type does not change any defensive properties of the Pokemon’s default typing nor does it override what types are considered STAB for them.
-All types gain 1 Extra Dice added to their damage pools the first time a Stellar type Pokemon uses a damaging move of that type during a scene. Stellar Form Terapagos can use this bonus for every type any number of times.
-Tera Blast becomes 4 power and counts as STAB. The damage dealt is always typeless and ignores Wonder Guard. However, every time a Pokemon uses a Stellar-type Tera Blast, their Strength and Special attributes are lowered by 1.
-Terastallized Pokemon always take Super-Effective damage from Stellar-Type Tera Blast and Tera Starstorm
-Any interactions with Moves and Abilities(Such as Color Change or Conversion) to try to change a Pokemon’s type to the Stellar Type automatically fail.
Terastal Forms:
-Some Legendary Pokemon change form when Terastallizing. These forms have only a single possible Tera type and also change the ability or(in the case of Terapagos) stats of the Pokemon. These are the following Terastal forms:
-Ogrepon (Teal Mask): Tera Typing – Grass; Ability – Embody Aspect [Dexterity]
-Ogrepon (Wellspring Mask): Tera Typing – Water; Ability – Embody Aspect [Special Defense]
-Ogrepon (Hearthflame Mask): Tera Typing – Fire; Ability – Embody Aspect [Strength]
-Ogrepon (Cornerstone Mask): Tera Typing – Rock; Ability – Embody Aspect [Defense]
-Terapagos: Tera Typing – Stellar; Ability – Teraform Zero; Changes from Terastal Form to Stellar Form