You put a guy who can solo Saint Seiya and won a fight against the Medaka Box Universe http://www.narutoforums.com/showthread.php?t=820153
Against DBZ, with speed equal. Love Train allows any all all misfortune to be placed away somewhere else no matter what. The only reason he lost was due to the Johnny, Gyro, and Trish getting rid of it before taking out President Valentine. In addition, Funny Valentine's power allows him to cross other dimension, what he does is cross into another dimension, find an alternate version of whoever he is fighting, bring that person out into the present dimension and when He can pull out an alternate version of them and make them contact with one another, causing both to be erased from existence in that world. Dirty Deeds Done Dirt Cheap's power is hopping through parallel worlds, its how he drew out an alternate note, DIEGO Brando, not Dio Brando, who possessed the Stand, The World which can stop time
He can also use this to possess his alternate incarnations in other worlds to heal any damage done to him.
as for love train:
- D4C - Love Train: An ability given to Valentine from Lucy's Stand. Her body generates a gap in space that sends misfortune elsewhere, leaving only good fortune. Using D4C, Valentine can enter this space, causing any attack aimed at him to be directed at someone else across the globe. This makes Valentine effectively invincible. It apparently allows him to easily travel along the ground, shown when he pursues Johnny and Gyro under the train tracks, and across a grassy field. Due to Lucy's stand's ability, objects continuesly move closer to her, including trees, signs, and even the oceans. These shifts in position seem to favor Valentine.
Besides being invincible to attacks while within the gap in space, D4C can make even its most insignificant attacks fatal. Any wound would rise up the body and eventually reach a vital spot before dealing damage. A scratch or bite on the finger can become a scratch on the heart.
This ability can only be used a certain distance from Lucy, so if she is moved, then he is forcibly pulled with her. However, gravity is constant for Valentine when he travels between dimensions, making it a power capable of traveling with Valentine that can affect him inside the gap. This keeps him from breaking into pieces and becoming scattered across the different worlds.
And even if he is fatally injured he can simply bring out another version of himself from another universe.
as for a better analysis of his power
- Dimension Hopping: Dirty Deeds Done Dirt Cheap allows different parallel worlds/dimensions to co-exist at the same time and/or in the same place. It also allows its user to visit these parallel worlds/dimensions and interact with them. Valentine travels by being closed between two objects. Liquid materials such as water count as objects as well.
Valentine can even pull other people to other dimensions by forcing them between two objects. Valentine usually performs the latter by slamming a door on them while they are backed against a wall. However, as no two versions of the same person can co-exist in the same dimension, one of them will have to go back into their own. If not, if they get too close to each other, both will crumble, splitting into several cubes and ceasing to exist. This rule does not apply to Funny Valentine as he has D4C.
If Funny Valentine becomes injured, he can hop into another dimension and move his consciousness to the body of that dimension's Funny Valentine, thus nullifying all his wounds. This ability makes him nigh invincible, since the only way to truly defeat him is to kill him with one blow. Furthermore, he can summon his alternate selves into his dimension to outnumber his opponents, each of which also has its own D4C.
Keep in mind that he was beaten by an attack that required infinite energy, not to spoil it for anyone but he didn't really die instantly from that, not to mention all the other things they had to do.
Really, add that to the fact that only Stands can see and hurt other Stands, this is a stomp, there is nothing they can do to hurt him with Love Train active, and since Lucy is not in the battle they can't take her out either.
Also an example of his dimensions
And Love train:
Not a scratch as you see the attacks seemingly go through him.