no even sure if this has been mentioned before but its something i saw ina vid over the past month and I found it really helpful:
Charz and squirtle have a very good grab-release game. You may be asking me what I'm talking about. Allow me to explain. Instead of grabbing then throwing in any given direction, you just sit there and deal damage whiule you have them in a hold and then when they break away you grab them again and repeat.
It's another great way to rack up damage, not to mention Charz has a killer grabbing ability with grabbing speed to top it all off so imaging how well it works(no vids of my success, sorry but take my word for it, i got alot of my friends frustrated with the chain grab-releases last night). anyways, as I was saying, this is pretty simple and it can make a difference when it comes to playing defensivly or playing in general. for me I found it takes a couple of grabs to get your opponent learning what to do and that is spot dodge and or dodge roll away form it. However, charz has awsome spot dodging abilities so he can grab, miss and spot dodge if you oppnent tries to counter, or spot dodge themselves, which them oyu can easily punish them by getting them in another chain grab-release.
imo, since charz can spot dodge well, you can mindgame your opponent into thinking you will grab but dont and then continue it, squirtle doesnt have that kind of capability to spot dodge and follow up as quickly as charz. but hey, i found this useful and I'm glad it helped me out alot.
imo, the ability to do this easily outweighs the fact they can spot dodge or roll to avoid, even so, if you are quick to react or can tell what they will do next, you can just counter or follow them and set yourself up for another grab-release chain.