メガポーション [mega potion] in Japanese.
Final Fantasy X
Buy: ? gil (sell: ? gil)
Obtain: (multiple ways), bribe Grendel
Equip effect: -, Aeon effect: x60 for Curaga
Description: Restores 2000 HP to every party member
Other: deals 2,000 damage to all undead in target party
Final Fantasy XIV

Effect: HP +20% (max 600)
Buy: - (sell: 281 gil)
Craft: ALC 45 x2 - Water Shard x4, Yellow Ginseng, Sagolii Sage, Mistletoe, Distilled Water
Type: Potion, Stack: 99
Description: This potent concotion instantly restores a large amount of HP.
Type-0

Buy: 1,500 gil (sell: 150 gil)
Shop: Underling (after mission 3-2), Multi-player menu
Drop: Iron Giant, Wulframiter
Treasure: missions 6-1, Northern Tunnel
Obtain: many NPC chats, clear 3-19 SOs, from Emina Hanaharu and Kazusa Futahito events, etc
Description: Restores up to 50% HP for all party members.
Category: Item