Transformation is a new twist on Fever: at the start of a match, players choose between Mega Puyo Rush, where the player races to match three or more Puyos on a 3x6 field, and Mini-Puyo Fever, where the player clears Fever-esque preset chains on a 10x18 field. The chosen gameplay mode activates when the Transformation gauge is filled, and also causes the player character to transform into an adult and child respectively.
The main story mode forgoes the gauntlet format used by most other Puyo Puyo games to that point in favor of a more traditional story with acts and episodes. Ringo Ando, a young student hailing from a much more mundane universe from that of the Compile or Fever characters, suddenly finds her world flooded by Puyos and goes on a journey to make sense of the ever-increasing wackiness that follows.
Tropes that appear in Puyo Puyo 7:
- Another Side, Another Story: After beating the story the first time, you're allowed to play as one of Ringo's companions at the time of their presence for certain chapters.
- Anti-Frustration Features: The Wii fan translation adds something that wasn't in the original, which is located in the tutorial for Transformation mode. When playing with Both transformations, what you transformed into was seemingly random, but it turns out there IS a way to know; the last Puyo popped before transforming must be red, blue, or purple to turn Mega, and yellow or green to turn Mini.
- Area 51: Is visited by Ringo and the gang, who meet the Dark Prince there.
- A Winner Is You: This game downplays this trope singlehandedly due to the epilogue, but the ending before the credits certainly qualifies. After an extremely easy final boss fight against Ecolo, he laments his defeat, Arle, Amitie and Ringo celebrate with one line each, cut to credits in 5 lines and less than 10 words.
- Brainwashed and Crazy: Anyone possessed by Ecolo.
- Breaking Old Trends: This is the first game where the Dark Prince can be fought, but not as a Final Boss or as The Dragon.
- Darker and Edgier: Downplayed. While still having the familiar cute, colorful, and comedic tone SEGA's interpretation of the series is known for, Puyo Puyo 7 would start the trend of games having a plot that involves the prevention of an apocalypse-like situation and including more drama.
- Defeat Means Friendship: A defeated person might tag along with Ringo for the story, as she takes a few heroes and, for a short bit, Dark Prince.
- Denser and Wackier: Zig-Zagged, as while the setting of 7's world is dramatically more mundane than even the Fever world, to the point the supernatural doesn't exist, 7 also introduces recurring world-hopping and dimensional and cosmic themes into the series.
- Guide Dang It!: In the game, the Transformation mode allowed you to pick Both transformations. However, it implies the mode randomly picks one or the other, when in reality it's determined by the color last popped. Outside of the Wii fan translation, the game doesn't elaborate on this.
- Henshin Hero: The Transformation mechanic transforms characters into their younger or older selves.
- Limit Break: Transformation mode, which actually causes your character to transform along with all their Puyo. Mini mode is like Fever, only the Puyo are tiny, whereas in Mega mode, you play with huge Puyo that pop in groups of 3 and every match counts as a chain.
- Only Sane Man: This role is usually held by Arle, but as of this game it seems to have been given to Ringo.
- Suspiciously Similar Substitute: Everybody who wasn't in the previous game uses the stats of characters that were present in 15th Anniversary but absent here.note
- Theme Music Power-Up: As with Fever mode, entering Transformation mode changes the music to a more up-beat song.
- Trapped in Another World: Arle and co. end up getting sent to Suzuran at the start of the incident, then get trapped between worlds when Dark Arle throws wide the rift. Ringo and her friends eventually get a taste of this too, being sent to Primp as a result of the rift being opened.
- You Can Talk?: If you play as Ringo, Amitie's introduction to squirrel-bear hybrid Risukuma has her react to his ability to speak with a surprised "He can talk?"