This card is the final form in the "Inpachi" series. This form of "Inpachi" was upgraded by "Kozaky", similar to "Giga Gagagigo". Incidentally, they are both the strongest in their own respective fields (ATK for Gagagigo and DEF for Inpachi) and the same Level.
"Kozaky" can be seen in the bottom right hand corner of this card.
The size of "Woodborg Inpachi" compared to "Kozaky" would suggest that "Kozaky" and, by extension, "Giant Kozaky" are much smaller than it would seem.
This card appears to have been repaired after being sliced in half. This may be due to the events that happened in the card "Double Attack."