"The draw could have been a lot worse for us and all the pools look quite even, so I'm quite happy with our draw," admitted the in-form Shellard.
Fiji have won the World Cup on two previous occasions and proved one of the most consistent and dangerous sides in the World Series but Wales will have no fears of facing the South Sea Islanders.
"We've beaten Fiji twice this year in the IRB World Series and played well against them both times," said Shellard.
"So that should give us some confidence but Tonga will be no mugs either. They were three tries up against us in the New Zealand tournament before we came away with a win while Uruguay are a top side as well.
"It is nice to go to this year's tournament as defending champions but we now obviously have a different squad to the one that did so well last time in Dubai. We've only got two boys (Lee Williams and Richie Pugh) left from that squad but the boys just relishing the opportunity ahead.
"But before the World Cup, we've still got four tournaments in the World Series and that is our bread and butter. There is relegation and promotion involved and we must ensure we get as many points as we can to hit our targets."
The six pools for the men's Rugby World Cup are as follows:
Pool A :Australia, France, Spain, Tunisia
Pool B: South Africa, Scotland, Russia, Japan
Pool C: Samoa, Kenya, Zimbabwe, Philippines
Pool D: New Zealand, USA, Canada, Georgia
Pool E: Fiji, Wales, Tonga, Uruguay
Pool F: England, Argentina, Portugal, Hong Kong