|All clear bonus||
+30 Nuisance Puyo sent on next chain. (console Puyo Puyo~n, Box)|
+30 Nuisance Puyo sent on next chain, receive Sun Puyo based on the size of the field-clearing chain. (Pocket Puyo Puyo~n)
Yon rule (よ〜ん, yo~n) refers to the set of rules used in Puyo Puyo~n. It is featured in the console versions of Puyo Puyo~n and Box, with Pocket Puyo Puyo~n using a modified version of the rule.
Yon rule is currently the only Compile-era rule that has not been used in a fully Sega-developed game.
- Main article: Super attack
Yon rule's most distinguishing mechanic is the super attack. Super attacks have powerful effects such as temporarily blocking Garbage Puyos or sending Puyos to the opponent. In order to use a super attack, a player must have a certain level of SP and then sacrifice their current pair of Puyos. Each super attack has a different SP charge rate and starting SP value, with charge rate further varying based on the number of previous uses of the super attack.
Super attacks are tied to characters in Puyo Puyo~n, can be unlocked for any character to use in Pocket Puyo Puyo~n, and are selected individually in Puyo Puyo Box due to the lack of multiple playable characters.
Hanging Puyo speed
When a Puyo pair is placed in a manner that causes one Puyo to be suspended in midair, the pair separates and "gravity" drops the hanging Puyo to the lowest available position. The speed in which this gravity effect resolves is drastically slower in Puyo Puyo~n than in previous Puyo Puyo games. This speed change is not carried over into Pocket Puyo Puyo~n, but is emulated in Puyo Puyo Box's Yon rule.
Drop speed and animation changes
In the console version, Puyos fall at a notably slower rate than in any other rule. Yon rule is also the first rule to feature Puyos that drop smoothly, as opposed to the "half-step" animation method used in previous Puyo Puyo games. Both Pocket Puyo Puyo~n and Puyo Puyo Box revert the automatic drop speed changes; Pocket Puyo Puyo~n also reverts the animation change (and gives the option to use half-steps or full-steps), while Box retains it.
Pocket Puyo Puyo~n
Pocket Puyo Puyo~n's handicap setting is a Nuisance multiplier ranging from x0.1 to x4.0.