The Gram Scale Tournament is open to any A·T team of B-Class or higher; however, the necessary registration documents must be completed and submitted along with the team leader's R.E.A.D. data before the clock tower at Tropaion Tower tolls nine times.
Once applied, matches are randomly determined by the central database in the Tropaion Tower. Any class of battle is possible; usually, the higher-ranked team decides the type of battle and location. The tournament progresses using a knockout style of elimination, and the finals are a zero-gravity D-Class battle in the main elevator of the Tropaion Tower itself.
Sleeping Forest serves as an officiator to the tournament, as Tropaion Tower is their territory. However, should a particular team enter to win the Sky Regalia and possesses the strength to do so, they will enter the tournament personally to deal with the threat.
The current iteration of the GrandScale Tournament is in progress.
The nine tolls of the Tropaion Tower leading up to the beginning of the tournament occurred at the following points in the story:
- First toll: Kogarasumaru begins their ascent to B-Class.
- Second toll: Ikki leaves the Noyamano household.
- Third Toll: Kilik reveals the history of A·T and Sora reveals his true motivations.
- Fourth Toll: Ikki begins his counter offensive against the White Wolf Clan.
- Fifth Toll: Agito completes his Bloody Blade Fang and executes it for the first time.
- Sixth Toll: Kazu wishes he could have beaten Ikki.
- Seventh Toll: Nike and Sora commence the takeover of the U.S. Fleet aircraft carrier.
- Eighth Toll: Ine Makigami meets John Omaha for the first time.
- Ninth Toll: Ikki prepares to register for the tournament.
Thus far, the following matches have either taken place, or are underway:
Kogarasumaru vs. Inorganic Net
Not an official match, since Kogarasumaru was not a competitor at time of battle; they fought for competing status and received Inorganic Net's permanent seed status.
Alumite Drop vs. Giga Giga Eyes
- Location: Iwate
- Battle Type: ??
- Victor: ??
Kogarasumaru vs. Highway Circus
Kogarasumaru vs. Sleipnir
- Location: N city
- Battle Type: C-class Air
Genesis vs. Sleeping Forest
Kogarasumaru vs. Genesis
List of teams
A list of the teams participating in the current Tournament is given below:
|Team||Class||Previous Entries||Best Round||Winning Odds|
|Sleeping Forest ※1||Special A||--||--||--|
|Lion Heart||--||--||First Runner-up||x9.0|
|Thunder Headz ※5||A||--||--||x21.2|
|Fat Boys Train||--||--||--||x22.5|
|Quirky Izumi Troupe & Trance Mask||B||1||1||x388|
|Easy H (Eta)||--||--||--||--|
|Blow The Beast||--||--||--||--|
|Giga Giga Eyes||--||--||--||--|
|Inorganic Net ※6||N/A||N/A||N/A||N/A|
※2: Entered to win the Sky Regalia.
※3: Entered by winning seed status from Inorganic Net.
※4: Currently merged into Jiggy.
※5: Previously team "Crazy Mask".
※6: Has permanent seed status, but does not actually participate.