These are monsters 100 to 199 of RotDS 1.8.3. They are in 4bpp PNG format. You can download all monsters here. For the rest of the monsters, choose one of the below link:

0-99 - 200-299 - 300-383 - Espers

Monster 100 to 199

100.png101.png102.png103.png104.png105.png106.png
107.png108.png109.png110.png111.png112.png113.png
114.png115.png116.png117.png118.png119.png120.png
121.png122.png123.png124.png125.png126.png127.png
128.png129.png130.png131.png132.png133.png134.png
135.png136.png137.png138.png139.png140.png141.png
142.png143.png144.png145.png146.png147.png148.png
149.png150.png151.png152.png153.png154.png155.png
156.png157.png158.png159.png160.png161.png162.png
163.png164.png165.png166.png167.png168.png169.png
170.png171.png172.png173.png174.png175.png176.png
177.png178.png179.png180.png181.png182.png183.png
184.png185.png186.png187.png188.png189.png190.png
191.png192.png193.png194.png195.png196.png197.png
198.png199.png