This is a very uncommon version of shaddoll train, that uses lots of cards, but besides of the number of cards, this deck looks more consistent then the standard version with 40 cards.
Due to the great number of kaiju cards in the main deck, you have a very strong element surprise in the first game, i prefer to play 2 of each kaiju, because you can use the dark for allure, the light you use as a material to your xyz monsters, cause its a lvl 10 machine, and the komungus its the weakest of the kaijus usually you use him to tribute your opponent monsters or fusion summon shekinaga.
about the side deck:
The kaijus are really good in the first game, but a very good trick in the second game is to take the entire kaiju core(9 cards) and put a good side in the deck, and have a 9 card space for side deck its pretty good.
Necrovalley could look a little bit strange, due to the cards we have that use the graveyard, but its a really good tech against some decks, and you can also search it with your terraforming, and if you really need to take the necrovalley off, it's also very easy for you.