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This is being able to get enough cards on the field to try the Synchro Summoning mechanic

SE Secret Rare QCSE Quarter Century Secret Rare Fiendsmith's Sanct X SPELL Quick-Play If you control no face-up monsters, or the only face-up monsters you control are LIGHT Fiend monsters: Special Summon 1 "Fiendsmith Token" (Fiend/LIGHT/Level 1/ATK 0/DEF 0), also you cannot declare attacks for the rest of this turn, except with Fiend monsters

Retrieved 2018-01-04

So the only strategy I can see for this card is to get as many energy cards into play as possible and then use Voltage Increase and attach them to Raichu every turn that way you can more than likely one hit knock out almost every Pokemon with Mega Thunderbolt

Every time a Numeron Gate card attacks, you can double all other Numeron Gate cards attack power