I tried making a calc
Magnitude 10 right? The max distance in Mystery dungeon is a room.
Ill use this room as it is the biggest one i've seen anywhere
The big blue square is, of course, the room map, thus it's length is the max distance one magnitude attack can reach. Note that a single pixel in the screenshot doesn't equal the same as a pixel in the image's resolution so i am using a pixel scaling site for this.
squirtle is 38px but 50.8cm
1px is 1.33684210526cm
a wonder tile is the size of one general tile so it should be equal to the stairwell in size
A wonder tile is 49px thus it is 65.5052631579cm
now for the map
a stairwell is 8px
the room is 414px
the room is 3389.89736842cm or 33.8989 meters
let's get on with the calc
10+(0.0238*0.03389)= 10.000806582
10^((1.5*10.000806582)+4.8)= 6.3271754e+19 joules
6.3271754e+19 joules = 15122312141.49139595 tons of tnt or 15.122gt which is
6-C
my main issue would be the fact that we see no visible destruction to support the suggested strength for the earthquake so i feel like mag 10 may be an overstatement. Though i never did get to see the animation for the 3d games