Monster Strike

Monster Strike (モンスターストライク) is a free mobile game for and  developed by. On July 10, 2022, a collaboration with the anime JoJo's Bizarre Adventure: Stone Ocean was announced. The collaboration began on July 15, 2022 and ended on August 2, 2022.

Summary
Monster Strike (shortened to MS or Monsuto (モンスト)) was originally released in Japan on August 8, 2013. It is a with  monster-collecting  and  elements. By October 2018, it had surpassed Puzzle & Dragons as the highest grossing mobile app of all time, having then grossed US$7.2 billion worldwide. A North American version of the game was released in October 2014, but by August 2017 service was closed.

Gameplay
In MS, players collect monsters through various means to create teams to take on dungeons called Quests (クエスト) with three of their own monsters and a fourth from another player; online and local multiplayer is also available with up to 4 players. In the quests are enemy monsters scattered across the field. Players then slingshot their own monsters into them to inflict damage. Player monsters come in two types that reflect how they interact with enemy monsters: Bounce (反射) and Pierce (貫通). Each monster also has an Element (属性): Fire, Water, Wood, Light, and Dark. The main statistics in MS are HP, Attack (ATK), and Speed (SPD), the last of which determines how far the monster will travel across the board; there is also a Luck mechanic that improves the rates of enemy monsters being obtained from Quests. Monsters possess Abilities (アビリティ) that are passive abilities that determine how the monster reacts to various stage hazards or other monsters on the board such as having an immunity to enemy Gravity shields or Warps or are a "Slayer" of a certain enemy Class (種族), generally the design motif of the monster. Some monsters also possess Gauge Shots (ゲージショット) that if successfully activated increase their ATK and SPD as well as activate Gauge Abilities. When hitting ally monsters on the field, it activates their Bump Combo(s) (友情コンボ), which can have multiple effects such as inflicting damage with homing missiles or laser beams or increasing the active monster's speed. After a certain number of turns have passed for any monster they are able to activate their Strike Shot (ストライクショット), their special move that initiates a zoom in, a voice line, and additional effects as the monster travels across the board.

Monsters are either obtained from Quests or from the Hatcher (ガチャ) by spending Orbs (オーブ). Monsters can also be enhanced through Evolution (進化) and Ascension (神化); evolution only requires items gathered throughout the game such as Sharls and Stoans while Ascension requires the collection of monsters from Quests. An Evolved or Ascended monster can also undergo Transcension (獣神化) through the use of Dragon Gems (獣神竜); Transcended monsters are often a combination of the Evolved and Ascended's best features and have a second tier of their Strike Shot that is stronger. Certain Transcended monsters can also undergo Transcension: Kai (獣神化・改) to further boost their stats, increase their level cap from 99 to 120, and gain a Connect Skill (コネクトスキル), an additional ability that only activates if certain criteria are met for the team.

In addition to monsters based on mythological figures, historical figures, locations, and in some cases abstract concepts, the game also features crossover content with famous franchises, including and. Some of their anime collaborations in 2022 included, , and.

Stone Ocean Collaboration
On July 10, 2022, XFLAG announced a collaboration between the anime JoJo's Bizarre Adventure: Stone Ocean and their mobile game Monster Strike that began on July 15, 2022, for a limited time. By purchasing the JoJo’s Bizarre Adventure: Stone Ocean collaboration starter pack, players could get an exclusive unit featuring both Jolyne and Jotaro. This unit was limited to one per person and was also only available from July 15, 2022, to August 2, 2022. The collaboration also featured five limited quest events against minor villains from the anime. These include Lang Rangler, Thunder McQueen, Gwess, Johngalli A., and Miraschon.

On July 14, 2022, it was announced that the character Enrico Pucci and the guardian beast Stone Free would be obtainable in the game from July 17, 2022 to August 2, 2022 by completing quests in-game. It was also announced that the collaboration would introduce a "Dollar" currency system could be earned from completing quests during the collaboration period. Players would then be able to use these Dollars on "G.D. St. Prison Missions" and redeem unique items from the "G.D. Store" until August 4, 2022. Completing these missions rewarded the player with a unit featuring Jolyne, Ermes and F.F., as well as unlocking various stickers including Emporio, Gwess, Pi-chan, Charlotte, and Pucci. Once all missions were completed, the player was rewarded with the "Jolyne’s Butterfly" medal.

On July 21, 2022, XFLAG made a second update to their collaboration, announcing a new unit featuring Emporio, Weather and Anasui that would be available from July 22, 2022, to August 2, 2022. The unit would be obtainable by spending 5 Dollars to make a phone call with your "mother" at G.D. st. Prison. Once a phone call was made, the player would've had to wait 24 hours before they were allowed to make another. Alternatively, players could spend an additional 10 Dollars to reduce the wait time. The update also introduced a system where players could earn "Ora Ora Points" as a log-in bonus, or by clearing the "Ora Ora Rush" collaboration quest. Players could then choose to spend their points on either Jotaro or Jolyne to get different rewards. On July 29, 2022, the option to call the Speedwagon Foundation was added to the phone booth, which unlocked a hidden "Operation Savage Garden" boss quest against Pucci. Beating the quest rewarded the player with the "Savage Garden" medal.