You can send 1 face-up Spell/Trap Card you control to the Graveyard to target 1 Level 4 or lower Insect-Type monster in your Graveyard; Special Summon that target in face-up Defense Position. The effect of "Beetron" can only be used once per turn.
Wish there was a way to get three of him, he would work great in a Gemini deck I am working on but isn't really needed.
Here is what I have so far any ideas would be great.
Weevil with sense insect(search for blazewing or grasschopper) or
Someone with sense fire Joey yugi(search for blazewing or Phoenix gearfried)
21 card deck
1xsymbols of duty
2xbig bang shot
3xsuperalloy beast raptinus
Also a sidedeck thought was 3xBeetron(Just make a 24 card deck to add a even monster trap ratio)
2xwonder balloons (instead of 1 of each equip)