Mega Gyarados

Fast moves

Name	Power	Cooldown	Damage window	EPS	DPS
Dragon Breath	6	0.5s	0.3s	+8.00	12
Bite	6	0.5s	0.3s	+8.00	12
Waterfall	19.2	1.2s	1s	+6.67	16
Dragon Tail*	15	1.1s	0.85s	+8.18	13.6

Charged moves

Name	Power	Cooldown	Damage window	DPS
Crunch	70	3.2s	1.3s	21.9
Hydro Pump	156	3.3s	0.9s	47.3
Outrage	110	3.9s	2.5s	28.2
Twister	45	2.8s	0.95s	16.1
Dragon Pulse*	90	3.6s	2.15s	25
Aqua Tail*	60	1.9s	1.2s	31.6
Return*	42	0.7s	0.1s	60

the pink letters mean the same type
* means the moves that cannot learn now, restricted to Community day
DPS=Power/Cooldown
EPS=Energy/Cooldown

Combo DPS

This is the DPS Ranking that is efficiently used Fast move and Charged move without dodges.

Combo DPS when attack

Rank	Fast	Charged	DPS
1	Waterfall	Hydro Pump	21.46
2	Waterfall	Return*	21.40
3	Dragon Tail*	Return*	20.43
4	Dragon Tail*	Hydro Pump	20.36
5	Waterfall	Aqua Tail*	20.29
6	Waterfall	Outrage	20.18
7	Dragon Breath	Hydro Pump	19.37
8	Bite	Hydro Pump	19.37
9	Dragon Tail*	Aqua Tail*	19.34
10	Dragon Tail*	Outrage	19.31
11	Waterfall	Dragon Pulse*	18.92
12	Dragon Breath	Return*	18.90
13	Bite	Return*	18.90
14	Waterfall	Crunch	18.29
15	Dragon Breath	Outrage	18.23

Combo DPS when defense

DPS degrees when defense than attack because the timing of move cooldown is constant.

Rank	Fast	Charged	DPS
1	Waterfall	Outrage	8.88
2	Waterfall	Hydro Pump	8.65
3	Dragon Tail*	Outrage	8.36
4	Waterfall	Dragon Pulse*	8.20
5	Waterfall	Aqua Tail*	8.12
6	Waterfall	Crunch	8.09
7	Dragon Tail*	Hydro Pump	7.91
8	Waterfall	Return*	7.61
9	Dragon Tail*	Dragon Pulse*	7.59
10	Dragon Tail*	Crunch	7.53
11	Dragon Tail*	Aqua Tail*	7.51
12	Waterfall	Twister	6.89
13	Dragon Tail*	Return*	6.88
14	Dragon Tail*	Twister	6.18
15	Dragon Breath	Outrage	4.98
16	Bite	Outrage	4.98
17	Dragon Breath	Crunch	4.61
18	Bite	Crunch	4.61
19	Dragon Breath	Hydro Pump	4.51
20	Bite	Hydro Pump	4.51
21	Dragon Breath	Dragon Pulse*	4.48
22	Bite	Dragon Pulse*	4.48
23	Dragon Breath	Aqua Tail*	4.45
24	Bite	Aqua Tail*	4.45
25	Dragon Breath	Return*	3.91
26	Bite	Return*	3.91
27	Dragon Breath	Twister	3.71
28	Bite	Twister	3.71

* is the move that damage window time is 2.5s or more.