To be honest the story feels a little rushed in places - you do well to show us the boy's enthusiasum for Pokemon for instance, which was neat to read about - but there's some things I feel you could improve. Most of the errors seem to come from unfinished or incompleted sentences running off one another, which some proofreading or even just a spell/grammar check would have caught. For instance, looking at the first paragraph:
“We’ve reached the grand finale of this championship both only have one Pokemon left” said the announcer. The crowd burst into excitement at the sight of Sinnoh’s champion Cynthia unleashing her final Pokemon “battle dance Garchomp” The crowd gets even more eager but frontier brain Palmer and his Rhyperior seem unphased.
Firstly, note that dialogue needs some puntuation within dialogue, so for instance here '“We’ve reached the grand finale of this championship both only have one Pokemon left,” said the announcer.' has the comma added after 'left', and “Battle dance, Garchomp.” has the full stop at the end. (Note also as it is a new sentence given the way you worded it, there's a capital B for battle, and a comma before Garchomp as Garchomp is being talked to by someone else by name there).
The colours for words and particularly attacks also is rather distracting if anything (and for some forum skins maks some words hard to read as well which just distracts more from the story) - I'd recommend against using it.
“Dragon Pulse” shouts Cynthia but Palmer’s Rhyperior defends himself with Protect. “Now get’em with Hammer Arm” commands Palmer but Garchomp skyrockets upwards dodging the attack and dives in with Fire Fang and causes an explosion. As the smoke clears Rhyperior doesn’t even have a scratch on it.
Also note that the description could use some improving - it's a good start that you mention at thimes how they execute some moves (e.g. 'dives in with Fire Fang...'), but a way to make the battle more intresting is to show us more on how attacks occur (say with Hammer Arm - we never really 'see' that Rhyperior throws one of his arms at the Garchomp with that attack - it's only implied that it actually does it after the Garchomp 'dodges(ing) the attack', and also with Protect - we don't see how Rhyperior protects itself from the Dragon Pulse attack and how that works).
Also adding in reactions from the Pokemon/trainers themselves would add to the battle's action - say would Garchomp and Cynthia be annoyed that the Dragon Pulse attack did nothing, and hence growl in frustration? Adding in such details makes the events more realistice and easier to imagine as well.
“What the?!” shouts A boy who strokes his hands through his dark hair in total angst.
Also note the odd small consistent mistake here and there - for instance there's no need for the 'A'
to be capitalised there.
Lucario clutches her egg sinister looking people in uniforms call out Zubats and Golbats to use Supersonic Lucario dodges each one of them. Sadly the same cannot be said for Lairon and the three Arons behind him or even an Onix who swings its tail at them. A bunch of Graveler use Rock Throw but it’s no good. Soon they are captured by a barrage of pokeball.
Proofreading would have helped here as this part was not easy to read. Firstly, it seems that there's two sentences merged into one in the first sentence (...clutched her egg sinister looking people...) - either separate into two sentences or add in a ', while' after 'egg'. Then it's also hard to keep track exactly who is attacking who - I assume the Arons behind 'him' are beind the Lairon, but it was not very obvious and needed some re-reading.
Just some things to consider - it could turn out to be a neat read, but fixing the basic grammar is one of the essentials for a good story. It's an interesting start (I am guessing the dream is more than a dream and mass-Pokemon-catching criminals is always interesting, although if the character ends up getting that Riolu egg then the story may be a bit too predictable in that regard), but you just have to watch out with the execution of the story itself. Hope that helps, and good luck with your fic.